Product Description

  • TG1221 will make effect only on the communication of mobile phones, instead of on other electronic devices and human bodies, thus can be used widely.
  • TG1221 is made up of up-to-date paste components and integrated circuits. With advanced performance, it is easy to install and use, and can work continuously for a long time.
  • As the manufacturing process strictly follows ISO9001 quality system, the device works stable and reliable. It is an ideal, reliable security product, which can be used to strengthen information security, and protect safe production and protect the environment at the same time.

At a Glance:

  • 4-channel type can efficiently provide shield for mobile signals from GSM,CDMA,DCS,3G, PHS,Satellite phone, etc.
  • 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 than 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.


  • Conference room, auditoriums, law court, library, exam room, school, cinema, theater, and hospital etc.
  • Oil station, gas filled station, oil field, oil depot etc.
  • At places where using mobile phones is prohibited such as government, military, finance, security, police and command center etc.

Technical Specifications

  • 3.2 Technical parameters
  • Effective isolating/shielding diameter: 5-30meters (depends on local signal strength)
  • Isolating signal bandwidth (default)
    -CDMA: 851-894MHz
    -GSM: 925-960 MHz
    -DCS: 1805-1880MHz
    -3G: 2110-2170MHz
  • Working time: can work continuously with AC/DC electricity power, can work continuously for 2hours with full charged battery
  • Environment temperature: - 40℃ to +55℃
  • Relative humidity: 30% -- 95%
  • Power adapter:
    AC: 110-240V, DC: 9V 1300mA / H, with built-in rechargeable battery
  • Dimension: 100, mm(L)×50mm(W)×200mm(H)
  • Weight: 0.7kg
  • Output power: 4W
Note: 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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