WIFI version, Used independently, Cannot connect to the alarm;                                                                                         
Wireless version, Can not be used independently. It needs to be connected to the control panel.

Response recovery is fast, response time30 seconds ;
Large screen LCD displays gas concentration and device status in real time ;
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 ;
Support SMS, central remote control and parameter settings ;
Up to 5 groups preset alarm calls, which can be set together with its SMS switch respectively.

Technical Parameters
Quiescent current：<20mA
Alarm current：<350mA
GSM system: 850/900/1800/1900MHz
Operating temperature: 0℃ +50℃
Relative humidity: ≦ 95% RH
Battery low voltage prompt: 3.9 ± 0.3V