Package Includes: One main unit One wireless door/window magnetic contact One wireless PIR sensor Two remote controllers One White siren One AC adapter One digital keypad One English user manual Main Features: 1. Bulit-in GSM 850/900/1800/1900MHz. 2. The alarm host with 2 relay outputs,one of the relays with linkage function. 3. Support remotely arm/disarm by phone key press/SMS. 4. With independent arm function. 5. Alarm by SMS & Voice,can start-up on-site monitoring. 5. Can configure two-way communication function. 6. Can define alarm guarding zones. 7. With weak GSM dignal reminder and GSM network failure remind function. 8. Wtih external power failure alarm function. 9. With backup lithium battery(built-in 800 mAh). 10. With 10 wireless aalrm zones,2 wired alarm zones,1 wireless fire alarm zone & 1 wireless SOS alarm zone. Technical Parameter: GSM frequency: 900/1800MHz (standard), 850/1900MHz (optional) Working frequency of detectors:3 15M & 433M (optional) Alarm mode: GSM SMS and voice dialing Alarm response time: Less than 8s (GSM in normality) The volume of siren: More than 110db Power requirements: AC 110-220V 50Hz or 60Hz 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: 20% to 95% (non-condensing) Dimension: 220(L)*147(W)*38(H)mm. Dimension: 220(L)*147(W)*38(H)mm Weight: 2.5kg/set.