Power Strip Hidden GSM Sim Monitor Device- Audio ear Bug Description Power Strip Hidden GSM Sim Monitor Device- Audio ear ... - Supports 800, 900, 1800, and 1900Mhz GSM networks - GSM bug features 500mAh rechargeable lithium battery so that it continues to work for ... up sounds and voices from within 5 meters radius - GSM bug works completely disguised without producing any sound, beep, or noise ...