Features: Fault self-diagnose. When the alarm fails, the fault indicator on the alarm shows a yellow power failure alarm test. Responsive high-pitched alarm. The built-in can immediately issue an alarming sound of 80db when detecting gas leak. Smart detection of various types of gas. Most household gas can be detected, no need to worry about the inapplicability. Automatic cut-off upon detecting gas leak. The gas alarm will automatically start solenoid valve to cut off source gas once gas leak is detected. Plug and play without wiring. It can be directly used after independently plugged in. Energy saving, environmentally friendly and low energy consumption. Specifications: Condition: 100% Brand New Material: ABS Color: White Optional Plug Type: EU 100-240V, US 100-240V Working Voltage: 220V Working Current: 100 mA Static Current: 5uA ALarming Current: 5mA Action distance: 1.5mm Detection Distance: 20~30m Transmitting Frequency: 433MHZ Transimitting Distance: 30m Working Temperature: -10~50℃ Alarming Sound: ≥85dB Scope of application: Natural gas, liquefied gas, gas Communication mode: wired Alarm mode: Acousto-optic alarm Installation Mode: Wall mounted Package Weight: Approx.251g/8.9oz Package List: 1 x Alarm Detector 1 x Bracket 1 x Screw Pack 1 x Instructions Note: 1. Installation height shall depend on the gas type. 2. Installation location shall not be too close to gas cookers. 3. Installation location shall not be in somewhere having a large air flow, like exhaust fan, doors and windows. 4. Installation location shall not be in any wet places like bathroom. 1、Fault self-diagnose. When the alarm fails, the fault indicator on the alarm shows a yellow power failure alarm test. 2、Responsive high-pitched alarm. The built-in can immediately issue an alarming sound of 80db when detecting gas leak. 3、Smart detection of various types of gas. Most household gas can be detected, no need to worry about the inapplicability. 4、Automatic cut-off upon detecting gas leak. The gas alarm will automatically start solenoid valve to cut off source gas once gas leak is detected. 5、Plug and play without wiring. It can be directly used after independently plugged in.