This is probably the only GSM-PCS room audio infinity transmitter to be completely hidden (including battery and antenna) inside an ordinary-looking, actually working digital desktop calculator.

Operation is extremely easy: simply plug in any SIM card then dial the calculator-shaped GSM/PCS infinity bug SIM/telephone number from any touchtone in the world: the calculator-shaped GSM infinity bug will automatically answer your call without making any noise or blink/flash and you will be able to listen in to what is actually going on in the room where the calculator-shaped GSM/PCS infinity bug is located.

Additional advanced features and programming are also available as the GSM/PCS calculator room audio transmitter can operate in passive (described above) as well as in active call mode. The active call mode operation is made possible by a very special voice detection circuit that will have the transmitter to place an outgoing monitoring call to the listening post phone number (either landline or cellular) whenever the unit detects any voice or room audio.

Remote programming and reprogramming is also possible as this unit can be totally remote-controlled by a series of SMS commands.

The powerful internal rechargeable battery pack allows up to one entire week of continued operation (stand-by mode).

This model works WORLDWIDE under any GSM-based cellphone network (GSM 900-1800Mhz and PCS1900Mhz US frequency standard). Rechargeable battery and battery charger are als provided included.