This product uses military technology GSM module with voice-activated automatic calling back function, also can increase extension as magnetic sensor or vibration sensor, can be installed at home,company,shop and warehouse,etc, when a thief open your door or window, move your car or your valuables, the alarm will notify you, to ensure family life and property. this product with compact size, voice clear, long standby time,simple operation, stable performance, remote control etc. 
 

1. GSM monitor 
2. Voice activated function  
3. SMS to control voice activated on or off 
4. GSM door magnetic alarm 
5. door magnetic sensor alarm  
6. door magnetic sensor 
7. Battery volume checking function by sending SMS 
8. Anti-thefting, door watcher 
9. 2 in one of GSM monitor + door magnetic sensor

 

 Features  
 

1. the world's infinite distance voice transmission ( using the GSM signal transmission, no distance limit can be inter-provincial cross-border) ; 
2. ultra-clear sound 
3. Small size like a match box, portable 
4. 900/1800 or 850/1900 frequency   
5. With lithium battery inside too ( 70-150 hours standby for voice control,or 120-240 hours for without  voice control ) . Send GDM3 to check battery volumme . 
6. Voice activated function: 
   Send GDM1 to start voice activated control 
   Send GDM2 to stope voice activated control 
7. Door magnetic sensor control ( means if your door is opened ,the alarm will send a message to inoform you that your door is opened ); 
   Send GDM4 to start voice activated control 
   Send GDM5 to stope voice activated control