GSM listening device in adapter   (ID: B35)

In the adapter equipped with a standard USB port there is a built-in GSM audio device.
It uses a SIM card that should be inserted. After you dial the number of the card then you will be able to hear anything that's spoken near it.
The device has a voice activation function which will make it dial your number.
To function away from a power socket there is also a battery that provides two hours independent operation time in listening mode.