Features Hardwired AC/DC24V;AC85-260V 50/60Hz WiFi Enabled N-B Communication 3.97”TFT color display, 480*800 resolution Capacitive touch Panel Dual Channel NDIR CO2 sensor NDIR life time 15 years 7 days CO2 history data diagram 7 days temperature history data diagram 7 days humidity history data diagram With humidity sensor (+/- 3%) With ambient light sensor CO2 high, low alert message reminder C/F temperature display Children touch-lock Auto change daylight savings (DST) Multi languages Night light option (Auto On/Off with ambient sensor) Auto backlight dim with ambient light sensor With fan control With CO2 valve control On/off schedule