It works with the frequency of 850, 900 and 1800 - Furnished with specially designed embedded microphone system, no configuration required. Just dial the SIM card number inside the unit and it will transmit any instant conversations over the GSM net... - Update: 2011-10-02

This product uses military technology GSM module with voice-activated automatic pull back funtion,also can increase extension as magnetic sensor or vibration sensor, can be installed in home, companies,shops and warehouse,when a thief open your door... - Update: 2011-07-20

This product uses military technology GSM module with voice-activated automatic pull back funtion,also can increase extension as magnetic sensor or vibration sensor, can be installed in home, companies,shops and warehouse,when a thief open your door... - Update: 2011-07-20

This product adopts Taiwan military technology and equipped with acoustic alarm function.. It is small and stable, easy to install and operate, besides, with long standby time. It is used for remote monitoring, positioning and tracking. Operating ... - Update: 2011-07-20

Allows you to monitor your home and office from anywhere in the world (as long as there is a phone with you) - Rechargeable battery provides long "listening" time - Recharged by any USB port or by the included USB AC Charger - Travel Weight Note:... - Update: 2011-07-20