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You selected inventions in category Electrical Engineering

  • Steel Crowd Control BarricadeSteel Crowd Control Barricade

      Durable Metal Products Steel Crowd Control Barricade supply best offer and good quality. It is your worthy temporary fence barriers.


      Crowd Control Barricade system is ideally suited for usage of large events,sporting events, Olympic Games,concerts, public gatherings,construction sites and some designated areas you need to divert or keep the public away from.


      Steel Crowd Controls Barricade has flat feet,bridge feet and claw feet. they provide a quick and firm installation to ground.Perfect situations for safety.
      Recommended specifications: 

      Surface finishing:Hot dipped galvanized after total welded,Galvanized then PVC powder coated


      Frame pipe: Ø25x2mm, Ø32x2mm, Ø38x1.5mm, Ø38x2mm

      Pitch space:80mm,100mm,120mm,125mm,150mm

      Inner pipe: Ø20x1.2mm, Ø25x1.2mm, Ø32x1.5mm, Ø32x2mm

      Feet Type:Plastic feet with concrete,Flat steel feet,Bridge steel feet.Steel feet could be slidding wheel for easy removable.
      For more information about temporary fence and pedestrian barriers, Durable Metal Products could assist you,please do not hesitate to contact

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    • 8 Bands Remote Control RF Jammer for All Cellular GPS Lojack AlarmCPJP88 Bands Remote Control RF Jammer for All Cellular...

        8 Bands Remote Control RF Jammer for All Cellular, GPS, Lojack, Alarm,CPJP8
        Effective range: Up to 20meters radius, depending on the strength and type of cellular, GPS tracker, Lojack sytem, car remote control Jammer system;
        Input Power: Li Battery AC110/220V-DC12/2500mA/h;
        Antenna: External omni-directional;
        Operation temperature: 0-50;
        Humidity: 5%-80%;
        Size: L 11.9cm X W7.4cm X H29cm;
        1. This series cover six or eight frequency bands or with bigger jamming distance.
        2. This device utilizes a unique low power radio signal technology that interferes with the communication between wireless handsets and base station.
        3. Block all cellular phone, GPS tracker, Lojack sytem, car remote control communication, in you controlled area or to avoid information from being disclosed secretly during meeting, and yet it is jamming silently without user's awareness.
        4. Easily operated and user-friendly, no hassle installation needed, need no professional knowledge or skill, a DIY designed device to suit everyone, everywhere and anytime.
        5. Low Output power will not cause harm to human body or medical equipment
        6. Inside fans cool system.
        7. Inside rechargeable battery, working 2-3hours by battery.
        1. Hospital, medical center or where medical instruments should not be disturbed by cellular signal.
        2. theater, cinema, museum and art gallery.
        3. conference rooms, offices, libraries, schools and restaurant.
        Model# CPJ-P8A: Cellular phones+GPS+Wi-Fi+Lojack
        1)CDMA&GSM: 850 to960MHz
        2)DCS&PCS: 1, 805 to 1990MHz
        3)3G: 2, 110 to 2, 170MHz
        4)Wi-Fi: 2400 to 2483MHz
        5)GPS: 1570-1580MHz (GPSL1)
        6)4G WIMAX: 2620-2690 MHz
        7)4G LTE: 790-821MHz
        8)LOJACK: 160-175MHz
        CPJ-P8B+ Cellular phones+Wi-Fi+433MHz+315MHz
        1)CDMA&GSM: 850 to960MHz
        2)DCS&PCS: 1, 805 to 1990MHz
        3)3G: 2, 110 to 2, 170MHz
        4)Wi-Fi: 2400 to 2483MHz
        5)GPS: 1570-1580MHz (GPSL1)
        6)4G WIMAX: 2620-2690 MHz
        7)4G LTE: 790-821MHz
        8)LOJACK: 160-175MHz
        We can do customize frequency according to you request, please email us

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      • 16 Antennas Low Band All Bands up to 50m Model 3G 4G WiFi Signal detector with Cooling FanCPJX1616 Antennas Low Band All Bands up to 50m Model 3G...

          16 Antennas Low Band All Bands up to 50m Model, 3G 4G WiFi GPS Signal detector with Cooling Fan,CPJX16

          One of our the best desktop models with 16 antennas and range up to 50m that jamm all Low bands 130-500Mhz ,
          all types of Android phones,Tablets, Smart Phones, iPhones, VHF, UHF, GPS and remote control signals
          from various devices such as rc cars, rc boats, alarms, wireless sensors, amateur or professional remotely controlled toys, etc.

          16 Bands type frequency :
          1.130-200MHz; (3W)
          3.300-400MHz; (3W)
          4.400-500MHz; (3W)
          5.700-800mhz; (3W)
          6.800-900mhz; (3W)
          7.900-980mhz; (3W)
          8.1050-1200MHz; (2W)
          9.1200-1390MHz; (2W)
          10.1500-1600mhz; (3W)
          11.1700-1800MHz; (3W)
          12.1800-2000Mhz; (3W)
          13.2100-2199MHz; (3W)
          14.2300-2400Mhz; (2W)
          15.2400-2500mhz; (2W)
          16.2500-2700MHz; (2W)
          TOTAL : 41W

          1.Each of 16 frequency module/band is separate and adjustable.
          2.All 16 Frequency modules we can mix very flexible, Any combinations and customizations of frefenices are possible, so just send us your inquiry and we will give you our recommendation.
          3. Jamming Range Radius 10~50meters (-75dBm Omnidirectional antennas);
          4.The jamming distance will be varied depending on the signal strength and location;
          5.Working time: Without the time limit, may continue to work;
          6.Antenna: 300mm long;
          7.Power supply: AC100-240V and 12V cable to Car Battery (300mm Long);
          8.Dimension:395 x 238 x 60mm;
          10.Package contents:
          *1pc Desktop portable Jammer;
          *1pc AC Charger;
          *1pc Car Charger;
          *16pc Antenna;

          Welcome to Necom-telecom,
          we are jammer manufacturer for 8 years, hope our products are workable for your market.

          Professional manufacture following products:
          1)Portable Cell Phone Jammer/Blocker;
          2)Bloqueador Portable/Jammer;
          3)GPS Jammer;
          4)Wifi Jammer/Camera Jammer;
          5)UHF&VHF Jammer;
          6)High Power Cell Phone Jammer/Blocker;
          7)Cellphone booster/repeater;
          8)RF signal detector;

          2G,3G,4G, GPS, WIFI, VHF, UHF, 315, 433 ,Lojack all the frequency can be customized as your request!

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        • WiFi GSM CDMA 3G  Full-Band Wireless Cell Phone Signal Jammer with 14 Antenna JammerCPJX14WiFi GSM CDMA 3G Full-Band Wireless Cell Phone...

            WiFi GSM CDMA 3G Cell Phone Signal Blocker, Full-Band Wireless Cell Phone Signal Jammer with 14 Antenna Jammer,CPJX14

            1.CDMA 800 :850 to 894MHz
            2.GSM 900: 925 to 960MHz
            3.DCS/PCS: 1805 to 1990MHz
            4.3G: 2110 to 2170MHz
            5.GPSL1: 1570 to 1580MHz
            6.GPSL2-L5: 1170 to 1230MHz
            7.WIFI 2.4G: 2400 to 2500MHz
            8.VHF: 135 to 174MHz
            9.UHF: 400-470MHz
            10.4G Wimax:2620 to 2690MHz
            11.4G LTE:790 to 826MHz
            12.Lojack: 167-175MHz
            13.RF 315MHz
            14.RF 433MHz

            All in One with 14 bands frequencies
            Good cooling system with 5 cooling fans inside
            Low noise
            Can adjust or turn off any single band without influencing the other bands operation
            Work non-stopped
            Stable capability
            Could be used in car directly,With car charger.
            Total output power: 35W Jamming range: up to 20-70 m.
            Full set weight: 7.0kg
            Power supply: 50 to 60Hz, 100 to 240V AC
            With AC adapter (AC100-240V-DC12V)

            Application Area:
   can be applied at meeting rooms, conference rooms, museums, galleries, theaters, concert halls, churches, temples, restaurants, classrooms, training centers, factories, banks, trains, bus and more
            2.For some locations of special purpose such as hospitals, gas stations and more, Please do field test first to make sure no interference happened to the normal operation of their equipment and instrument
            Warranty: One year from delivery date.
            Multi-functional Jammer x 1
            AC adaptor x 1
            Car adaptor x 1
            Antenna x 14

            Type: GPS, Wifi, 4G, LoJack/XM, UHF/VHF, RF Jammers, Phone Jammers
            Jammer Effective Radius Range: 50-80 meters
            Frequency Cell Phone: CDMA 850-894MHz, GSM 925MHz-960MHz, DCS 1805MHZ-1880MHZ, 3G 2110MHZ-2185MHZ
            Frequency 4G: 4G LTE 725-785MHZ, 4G Wimax 2620-2690MHz
            Frequency GPS: GPSL1:1500-1600MHz, GPSL2:1220-1230MHz, GPSL5:1170-1180MHz
            Frequency WIFI: WiFi 2.4G:2400MHz-2450MHz
            Frequency RF: Radio Frequency 315MHz, Radio Frequency 433MHz
            Frequency UHF/VHF: VHF 135MHz-175MHz, UHF 400MHz-470MHz
            Frequency LoJack and XM radio: Lojack:160MHz-175MHzXM

            Want to own a signal jammer that can help you to achieve the need to block all the normal wireless signals? Then just here this (EU) All Bands Cell Phone Jammer GPS WIFI VHF UHF 4G 315 433 Lojack 14 Antenna with Power Adjustable you are viewing just owns the powerful function.
            This high power signal jammer owns the newest design of 14 antennas, which enables this newest 14 antennas high power signal jammer to cut off the signals of WiFi 315 433 UHF VHF GPS CDMA GSM DCS PCS 3G and all the 4G mobile phones at the same time, and the jamming distance is up to 70 meters at most according to the signal strength in the detailed place. Thus what's more powerful is that the adjustable buttons have been used on this WiFi GPS VHF UHF 315 433 LoJack 3G 4G phone jammer so that it can allow people to adjust the power and also the jamming distance and jamming frequency bands easily. Also because of the design of the car charger this high power adjustable 3G 4G WiFi GPS VHF UHF 315 433 LoJack signal blocker can be used in the car easily. Moreover, the high quality cooling system design enables this adjustable WiFi 315 433 GPS VHF UHF LoJack 3G 4G phone jammer reach the 24/7 easily.
            And for more details you can just have a look at the following specifications. Besides as owning 14 antennas, we can also use this newest 14 antennas high power signal jammer to OEM the frequency bands you need for you as well, and you just need to contact us and tell us your detailed requirements.

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          • WiFi  4G Jammers UHFVHF Jammers 2g3GRemote Control Audio jammerCPJ-X12WiFi 4G Jammers UHFVHF Jammers 2g3GRemote...

              WiFi/4G Jammers, UHF/VHF Jammers, 2g+3G+Remote Control Audio jammer,CPJ-X12

              Adjustable 12 Band Jammer CPJX12s designed to block all wireless Networks including ALL cellular bands Lojack 173Mhz .433Mhz,315Mhz GPS,Wi-Fi,VHF ,UHF ,iDen, TDMA,CDMA, GSM, UMTS, DCS, PHS, PCS, 3G, 4Glte,4G Wimax ,AMPS, N-AMPS, NMT, TACS. Telephones or other electronic communication devices in the vicinity of CPJ-X12 product will be unable to receive signals or in the case of a mobile phone, dial outgoingcalls. The jamming Radius (2-50) meters-75dBm still dependson the strength signal in given area. The shielding radius of VHF/UHF signal should be less than cell phone signal. the CPJ-X12 Series that fits the appropriate commercial or institutional application.
              * Movie theaters, hospitals, Religious Places, churches
              *university, schools, classrooms, libraries
              *police forces and military, Government,
              * Inside jails. Prisons
              * Homeland Security
              * Correctional Centers
              * Petrochemical Industry
              * Sports Venues and Theaters
              * VIP Convoy Protection
              * Bomb Prevention/Disposal
              * Schools and Universities
              * Power Generating Plants
              * adjustable 12Band Jammer model#CPJX12
              * Blocks all cellular lojack ,433Mhz,315Mhz ,WI-FI,3G,4G ,VHF ,UHF ,iDen, TDMA, CDMA, GSM, UMTS,
              DCS, PHS, PCS, 3G, AMPS, N-AMPS, NMT, TACS
              * Up to Four (12) Frequency Bands; 2.5W/Band
              * adjustable output power each band / turn on/off each band Separately
              * Omini-Antennas with min. 2.5dBi each Band
              * only Interferes w/Downlink Base Station Frequencies
              * Slow Start-up Circuitry for Long Term Reliability
              * Over Temperature and VSWR Protection
              *Power Supply Source :50/60Hz/AC100-240V To DC 12V/6A Only can be working on DC12V
              * Demension(LXWLH):330mmx238mmx60mm
              *The jamming Radius (2-50) meters-75dBm still depends on the strength signal in given area
              adjustable 12Band Jammer model#CPJX12 All in one !
              The Models Works in all countries and jamming for all 3G,4G celluars ,Wi-Fi/Bluetooth,remote control,gps,lojack wireless device.
              detail frequency range :CDMA 851-894MHz, GSM 925-960MHz ,GSM(DCS) 1805-1880MHz GSM(pcs)1920-1990Mhz,3G(UMTS) 2110-2170MHz ,Wi-Fi 2400-2485Mhz,433Mhz,315Mhz,GPSL1 1575Mhz ,lojack173.3Mhz 4G Lte 725-770Mhz,4G Wimax2300-2400Mhz 2620-2645Mhz VHF/UHF Radio

              CPJ-X1201 For 2G+3G+2.4G+4G+GPS+VHF+UHF
              3G2100MHz: 2110-2170MHz;
              Wi-Fi/Bluetooth/Wlan: 2.4G:2400MHz-2483MHz;
              4G LTE 700MHz:725-770MHz;
              4G WIMAX: 2345-2400MHz;
              4G WIMAX: 2620-2690MHz;

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            • 4gWiFi Signal Jammer High Power Wireless Cell Phone GSM CDMA Bomb Signal BlockerCPJ6904gWiFi Signal Jammer High Power Wireless Cell...

                High Quality Best WiFi Signal Jammed,High Power Wireless Cell Phone WiFi GSM CDMA Bomb Signal Blocker / Jammer,CPJ690

                90W Stationary 6Bands Cellphone,Wi-Fi,Lojack,GPS Jammer/Blocker:CPJX690
                Basic features
                *Adjustable working range
                *higher power jammer
                *VSWR Protect high effiency power amplifiers
                * Good cooling system with cooling fan inside
                * Working non-stopped
                *Stable capability
                Technical Specifications Model NoOutput PortFrequency Range Output powerRemarks
                CPJ-X690GSM850850-894Mhz42dBmused in the United States, Canada, Mexico ,S. America. Europe, Asia, Australia, Middle East, Africa.GSM900925-960Mhz42dBmGSM18001805-1880Mhz40dBmGSM19001920-1990Mhz40dBm3G21002110-2170Mhz40dBm4GLte700Mhz690-806 MHz40dBmWi-Fi 2.4G2400-2483Mhz40dBm4G Lte26002600Mhz40dBm
                Optional FrequencyLojack173.03MhzWe can Configured in accordance with customer requirementsCDMA450430-450/460-470MhzGPS/GLONASSL1:1575.42Mhz L2: 1227.60MhzWireless Camera1.2G ,2.4GCar remote control433Mhz,315MhzWalkie-TalkieVHF,UHFRF Power Output:15Watt
                Protection Radius: Typical 50-100m@according the signal density mobile network
                Jammer type: Sweep Jamming
                Application Type: meeting rooms, conference rooms, museums, galleries, theatres, concert halls,
                churches, temples, restaurants, classrooms, training centers, factories, banks, trains, bus , hospitals, gas stations .
                Antenna Type:Omini-Directional/directional panel antenna optional
                Power Source : AC adapter (50 to 60Hz/100 to 240V AC -DC2V) and 24-27V
                Electric Filed (SAR):Compatible with ICNIRP Standards(Human safe)
                Operating Temp:-20 to +50 C
                Storage Temp:-40 to +60 C
                Dimension(LXWXH): 335 x 238 x 60mm
                weight: 9-13kg

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              • Multi Bands military Man pack bomb Jammer with High Power Convoy Jamming System  CPJ-MP8Multi Bands military Man pack bomb Jammer with...

                  Multi Bands military Man pack bomb Jammer with High Power Convoy Jamming System, CPJ-MP8

                  CPJ-MP8 is a High Power Convoy Jamming System, implementing the most effective and reliable RF jammer technology and equipped with a fully-integrated broadband jamming system. CPJ-MP8 is highly portable and light weight. Easy for back pack. It plays an important role to use the heavily loaded vehicle and back pack type devices in some extreme hard situation. The operator can carry it forward through the hills and muddy road, as well as Climbing steep mounts and stairs avoid casualties and improve the combat efficiency.
                  1. High-power Man pack multi-band RF signal jammer.
                  2. Modular construction for easy maintenance, repair and upgrade.
                  4.Adjustable power Max 90 watt total RF output power.
                  5. High portable, back pack type.
                  6. Internal battery, AC mains or DC power.
                  8. Systematic Smart Cooling System.
                  9. The general design of the system meets military requirements.
                  Technical specifications:
                  Frequency BandGSM,CDMA 3G 4G VHF UHF 433,315
                  Total output powerUp to 90 wattJammer module number8pcsJammer ModuleEach jammer module with antenna can be used as single jammer, all modules are controlled separatelyCooling systemSystematic smart cooling systemSystem ProtectionVSWR,over-voltage, over-current
                  Antenna typeHigh Gain Ominidirectional AntennasNumber of antennas8pcs
                  Power supply:AC110-240V,/DC27V
                  Jammer size380x283 x 150mm
                  Jamming system weight13kg( not include antennas 7kg and battery about 5kg ) ,
                  Operator temperature range-35 -+80Operator humidityUp to 80%
                  Bomb disposal squads, VIP protection ,special police(S.W.A.T),military security forces, bomb squads,anti-terro units,anti-drug units, Border control units ,checkpoint personnel used .

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                • 800Watt very high power prison jammer with cooling fan system for 3g4GGPSAMPSCPJ6022800Watt very high power prison jammer with...

                    800Watt very high power prison jammer with cooling fan system for 3g/4G/GPS/AMPS,CPJ6022

                    1)Use stronger and longer External Omni-directional antennas,all the TX frequency covered down link only
                    2)The latest design and Good cooling system with cooling fan inside
                    3)365 days non-stopped Work
                    4)Good quality 4-7 bands high power prison Jammer, Jamming for all mobile phone 2G,3G,4G signal and VHF/UHF Walkie-Talkie,WIFI,GPS bands.etc.
                    5)VSWR circuit protection to ensure system will not burn out should there be antenna short circuiting or disconnection
                    6)Outdoor waterproof metal alloy case design avoiding the sabotage,
                    1.antennas: external omini-directional or high gain directional panel antenna
                    2.Jamming range:up to radius 400meter @ -75dBm depending on the mobile service provider s network condition);
                    3.Total output power:: 75-250W select any 4-7 bands 15-50Watt per band for your require, 4.Power supply :(1)AC110-240V (2)DC27V
                    5.Signal source: Synthesized Operation
                    6.Temperature: -10 to +508.Humidity: 5% to 80%
                    Package information :
                    Device Size: 52X30X19cm not including antenna
                    Net Weight:18kg not including antennaCarton
                    Size: 47x27x60cm/1PCS
                    Gross Weight:25KG
                    Output port :4-7 ports optional Frequency for select :1:CDMA851-894MHz,2:GSM925-960MHz,3:DCS&PCS1805-1990MHz,4:3G 2110-2170MHz,5:VHF135-174MHz,6:UHF400-470MHz,7:4G1LTE725-770MHz,8:4GWimax2300-2400MHz OR 2500-2690MHz,9:WIFI2400-2483MHz,10:GPS1570-1580MHz,11:433MHz 12:315Mhz,13:LOJACK167-175MHz,14:4G1700,15:GPSL2L5:1170-1280 ,16:GPSL3L4:1370-1390 etc.

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