Use GSM wireless communication network to support SMS and voice alarm, audio and text message can overwrite  
Circular dial four or eight sets of telephone or cell phone number, store number can be up to 16-bit
Alarm provides 20 or 40 second recorded message tells the user when alarm
Trigger mode can be set to normally open, normally closed, or 12 volts DC trigger alarm dial
Trigger relay linkage output after 15 min
Programmable alarm conditions, reply 8 stops the current alarm number groups, reply stop all the alarm number 9 group;
Other CDMA alarm mode, 3G, such as wireless communication networks, and can be customized

★ Operating voltage: 11-15V/DC
★ Current: 40/160mA 

★ Product weight (gross): 0.35kg

★ Product dimensions (length x width x height): 140x30x90mm

★ Telephone:
★ Tel: 4 or 8 sets optional
★:900MHz/1800MHz/950MHz/1900MHz  GSM frequencies (optional)
¡Ï alarm inputs: normally open, normally closed, or 12V/DC (an alarm trigger)