Specification: Rated voltage:DC5V Power supply interface:Micro-USB Working current: lt; 200mA Applicable gas:Methane (natural gas), liquefied petroleum gas Alarm mode:Real voice reminder TFT color display:Perpetual calendar, real-time ambient temperature and combustible gas display Working environmentTemperature: -10~55?Humidity: lt; 95%RH without condensation Sampling method:Natural diffusion Range:0~100%LEL Alarm setting concentration value:6%LEL Alarm concentration error: plusmn; 3%LEL Response time: ?30 seconds, Automatic recovery of normal environment High temperature alarm setting value: 57? Alarm volume: ?70dB (1 meter directly in front) Alarm mode:Sound and light alarm, human voice prompt, mobile phone alarm push Warm-up time:180 seconds Service life 5years (under normal use environmental conditions) Wi-Fi: 2.4GH z Installation method:Wall-mounted