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3G 4G Cell Phone Blocker With Coverage 30~40m

model number:SJ-134


3G 4G Cell Phone Blocker With Coverage 30~40m


Cell Phone Jammer Professional for Blocking 2G 3G and 4G Phone Signals – 6 Bands Desktop Professional Cell Phone Jammer

Just by using this mobile phone jammer the 2G 3G mobile phone signals can be easily blocked within its jamming range. So for places like the classroom, meeting room, church, library and many other places this remote controlled 3G mobile phone jammer can be used to create peaceful condition.

It can be applied at meeting rooms, conference rooms, museums, galleries, theatres, concert halls, churches, temples, restaurants, classrooms, training centers, factories, banks, trains, bus and more. 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


-CDMA: 850-894MHz

-GSM: 925-960MHz

-DCS: 1805-1990MHz

-3G: 2100-2170MHz

-4G: 2500-2700MHz

Main function:

-4 channel type can efficiently provide shield for mobile signals from CDMA, GSM, DCS, PCS, WCDMA and PHS

-It only shields the signals from mobile phone and does not affect the normal operation of other electronic devices

-Generally, please use your mobile phone at the places more 200 meters away from the base station

-Switching on, it can work stably for a long time

-Slow start-up circuit can avoid sparkling caused by mechanical switch

Technical parameter:

-Effective isolating / shielding diameter: 100m

-Isolating signal bandwidth

-It can work stably for a long time

-Power input : AC110V-240V, 50/60Hz , 1.0A

-Power output: DC 4.2V, 10A

-Temperature: -40℃ to +55℃

-Relative humility: 30~95% (RH)

Product size:

25.5 x 11 x 3.2cm
Important Notes :
The jamming distances we mentioned on website are for customer’s reference only. The actual jamming distance will be varied depending on the signal strength and the use location and if full charges, etc.

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