Technical Parameter: GSM frequency: 900/1800/850/1900MHz (standard) Working frequency of detectors: 315M & 433M (standard) Alarm mode: GSM SMS and voice dialing Alarm response time: Less than 8s (Normal GSM signal) The volume of siren: More than 110db Power requirements: AC 110-240V 50Hz or 60Hz output DC12V Working power consumption: less than 0.6W Standby battery: DC 8.4V/800MAH (lithium battery) Standby battery working time: more than 15 hours Operating temperature: -10 ~ 55 Humidity: Less than 95% non-condensing Dimension:180(L)*130(W)*32(H)mm. Dimension:180(L)*130(W)*32(H)mm Weight: 2.5kg/pcs.