Notes: 1. WiFi function: You can use WiFi to connect to smart life APP/tuya APP control. 2.433MHz function: It can be used together with the alarm host, and can be used without wifi. 3. Bluetooth is only used for network signal connection and cannot be used alone. WIFI+Bluetooth is more stable. Specifications: Name: Gas leak alarm Installation method: wall-mounted Working voltage: 5V Power Supply Mode: USB power supply (without battery) Alarm volume: ≤80dB(within 1 meter) Alarm set value (adjusted by APP): 20ppm (default value) Wireless frequency: 433.92MHZ Wi-Fi Standard: IEEE 802.11b/n/g 2.4G Detection gas: natural gas, biogas, CH4 App name: Smart Life or TuyaSmart Package included: 1*WiFi Gas Detector (without battery) 1*Power cord 1*User Manual Package size:105*100*29