Audio Devices - GSM microphones

By using a SIM Card, this system allows you to listen while you dial a specific phone number (the one that was in use on the cell phone).

By using a SIM Card, this system allows you to listen while you dial a specific phone number (the one that was in use on the cell phone).

By using a SIM Card, this system allows you to listen while you dial a specific phone number (the one that was in use on the cell phone).

By using a SIM Card, this system allows you to listen while you dial a specific phone number (the one that was in use on the cell phone).

With this modified cellphone, the conversations can be heard remotely with an other phone and allows you to secretly hear the surrounding sounds and conversations around the Target Phone.