FeatureCan display three channels and indoor temperature and humidity at the same time, showing the comfort level of the three-level indoor environmentIndoor temperature, test range 0--50C, outdoor temperature, test range -50C-70C.Indoor and outdoor humidity detection range: 20%99%Indoor and outdoor temperature indication and humidity change trend.Record the highest/lowest indoor and outdoor temperature and humidityWhen the temperature and humidity upper limit alarms, the backlight will also turn oranges, and when the lower limit alarms, the backlight will also turn red, accompanied by an alarm sound. This function has a practical invention patentTemperature and humidity calibration functiontime and date displayNotice:Actual color may be slightly different from the image due to different light effectPlease allow 1-3cm deviation due to manual measurementNet weight: 267gGross weight: 380gSize: 12.5*2*12.5cmAccessories list: temperature and humidity meter*1, outdoor unit*3, outdoor unit base*3, USB cable*1, Chinese and English manual*1Power supply mode: AAA battery *3 or DC 5V power supply (shipment without battery) Material: ABS