1. Smoke intelligent algorithm 2. High sensitivity, zero false alarm, strong anti-interference 3. With voice prompts and voice alarms functions 4,GSM/GPRS intranet alarm system, support multi-channel alarm, like SMS, central internet, Wi-Fi, 433mlz, NB-LOT etc,to ensure that the alarm is stable and reliable 4. Support SMS, central remote control and parameter settings 5. GPRS is real-time online to get the latest working status of the device at any time 6. Up to 5 groups preset alarm calls, which can be set together with its SMS switch respectively 7.Power: DC9V laminated battery (6F22/9V) 8.Quiescent current: <10uA 9.Alarm current : <100mA 10.Transmitting distance: about 100m (open distance) 11.Operating temperature: 0 Celsius Degrees to + 50 Celsius Degrees 12.Relative humidity: about 95% RH, no condensation 13.Alarming sound: >80dB 14.Wireless transmission: 433MHz/1527/330K 15.Battery low voltage alarm: The alarm will emit wireless low voltage when the battery is under voltage Code, and the battery emits Wireless low voltage code every 24 hours under continuous low voltage 16. Product size: 10.6x10.6x4.2cm 17. Product material: ABS