?3in1 Integrated CO detectors?Our newest 3in1 carbon monoxide detectors Integrated carbon monoxide, temperature and humidity sensors, 2s refresh real time to detector the environment safety for us. Real time tell us the potential carbon monoxide gas hazards. ?Plug in Play design?US standard plug is compatible with 110V to 220V AC outlet. Fits all US standard AC outlet in bedroom, kitchen, living-room, basement, hotel room, office etc. All the data real times shows on the 2.1'' HD screen. ?Built-in 1000 mAh rechargeable backup battery?Provides 90-96h working time, helps to cope with sudden power outages, and also we can use it as a portable carbon monoxide detectors(short 3 day trip). Rechargeable design can help you save the cost of purchasing disposable batteries multiple times. ?All gas environment safety we care? Built-in UL2034 standard independent CO sensor, HD screen visible and 85 dB audible design is real time detect the gas environment, bring you extra safety for your and family. To create a full house safety warning for you. ?Wider detecting range?CO range: 0-999ppm, when the CO is 50ppm, the 85dB alarm will sound. Temperature range: 14F ~ 122F,5%. Humidity range : 0 ~ 95%RH,5% RH.