Wifi Leak With Temperature Function Combustible Gas Detectors Support WiFi Fire Protection Smoke Sensor Alarm Detector Smart Life app and Smart Home Wifi Natural Gas Sensor Combustible Coal Gas LPG Gas Leakage Smart Life Smoke Detector: Safety just an app away SmartLife Smart Wi Fi Gas Sensor and Alarm AYOUB COMPUTERS LEBANON. Notice: We have 3 versions. A: Wireless 433MHz detector, B: WiFi Gas detector with screen. C: WiFi Gas detector without screen. If you already have 433MHz wireless security alarm host in your home, advice choose option "A". If are the first time to install this product, advice option "C", it support wifi app, and it is more cost effective. If you want product be high end, advice you choose option "B". Type_A: Not support WiFi. Not Support WiFi, this is 433MHz Wireless gas leakage detector. When detect the gas leak, it will make beep sound alarm, also it will transport 433MHz wireless signal to trigger the security system alarm. Type_B: Support WiFi Support Tuya Smart Smart Life WiFi APP. Type_C: Support WiFi Support Tuya Smart Smart Life WiFi APP.