Features: 1. Zigbee3.0 Wireless Protocol, Natural Gas (Methane) And Other Combustible Gas Detection 2. Quickly Add Equipment With One Key, Real-Time Detection Of Numerical Gas Concentration 3. On-Site Real-Time Alarm Whistle 4. Support Multi-Device Intelligent Linkage 5. Easy To Install And Use Description: 1. App Name: Smart Life/Tuya Smart (Need To Be Used With A Gateway) 2. Wireless Protocol: Zigbee 3.0 3. Detection Gas: Liquefied Petroleum Gas, Natural Gas 4. Alarm Concentration: 8% Methane (Natural Gas) 5. Concentration Error: 3% 6. Alarm Mode: Sound And Light Alarm, Mobile Phone Push 7. Built-In Siren: 80dB 8. Power Input: DC 5V/1A 9. Working Temperature: -10~55 10. Working Humidity: 0%~99%RH 11. Wireless Distance: 50 Meters (Open Distance) 12. Installation: Adhesive Paste/Screw Fixed Plug Type: EU Plug, it applies to Indonesia, Germany, France, , Italy and so on voltage: AC100-240V size: 90 x 33.5mm Material: PC+ABS colour: white Package Contents: 1 x Bracket 1 x Double-Sided Adhesive Tape 1 x Usb Power Cord 1 Set Screw Packs 1 x Plug Power Adapter 1 x Gas Sensor 1 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.