Gsm alarm system Characterized by:
1, large-screen liquid crystal display Chinese
2, own time, billing, check function

GSM  alarm Specifications
Work: GSM900MHz (fired 890-915MHz, receive 935-960MHz) / GSM1800MHz (launched 1710-17850MHz, to receive 1805-1880MHz) dual-band 
Peak power: 2W 
Power consumption: static ≤ 25 mA, fired ≤ 600mA
Sensitivity:-104dB
Internal voltage: DC12V/1.5A 
Ambient temperature: 0  ~ +40  
Operating Temperature: 45% -90% (non-condensing conditions) 
atmospheric pressure :86-106Pka
Environmental Noise: <60dB 
antenna by overflow: 5dB (omni-directional) 
Ac Power Supply: 220Vac ± 10%, frequency 47-54Hz; 110Vac/60Hz 
Size: (L *w* h) 268 * 165 * 60 (mm) 
Weight: 2.0Kg/Pc