The GSM Infinity 2 way adapter is a cleverly designed, disguised GSM listening device that can be used to listen to conversations and surrounding sounds in designated room/s. the device is also a fully functional 2 way adapter and can be used to replace any adapter in the room often used behind TV’s, PC’s etc. This unit works by dialling in to the internal GSM bug that contains a SIM card (included). You can dial in to the device whenever you want and from anywhere in the world. It will automatically and silently answer and incoming call transmitting any audio input over the GSM network. The device has a 30 feet audio pick-up and is filtered for perfect audio clarity. To the naked eye the internal GSM bug is totally undetectable and covertly allows you to monitor all audio in that room without sound distortion. The Infinity transmitter is dual band and operates on any GSM 1800, or 1900MHz communications network. This is an ingenious design with exceptional audio clarity and unlimited calling distance (call from anywhere in the world) Supplied with a SIM card.