This 3G Mobile Signal jammer is used to prevent many problems related to mobile phone networks of different standards in any country of the world. 3G wireless frequency is also affected by this product. Many digital threats like surveillance, eavesdropping, private information stealing, illegal location tracking and others can be effortlessly prevented when this Portable Mini device is in your pocket and works. Mini Portable GSM CDMA 3G Cellphone Jammer Frequency: 3G, GSM900 and GSM1800 3G, GSM850 and GSM1900 Jamming Power: 57dbm Signal Coverage: 1-5 meters Power Supplier: Power adapter and battery Operating Current: 700mA Battery Parameters: 3.7V 1300mAh Li-ion, works up to 2 hours, recharging takes 2.5 hours Power Adapters: AC 110~250V 5VDC, Car 12~24V 5VDC, 2000mA both Antennas Info: 3 x SMA, 3dbm each (built-in) Size Information: 97x44x20mm Total Weight: 68g jammer, 300g package Work Temperature: 0~50 Celsius Air Humidity: 5~80% Please contact us for OEM or ODM for specially request Notice: Kindly please treat your Jammer the same way you use your Mobile Phone Virtue Design i: Look like Mobile Phone. More hidden ii: Internal Insulated Antennas iii: Replace Battery by hand, same like mobile phones iv: High Quality Design, Low heat anticipation, Continues operation v: Can continue to work when charging this GSM blocker is one of our old models, however it's still one of our top-sellers, because of quite low price and great specifications, a lot of people still want to choose this model.