Feature_x000D_Can display three channels and indoor temperature and humidity at the same time, showing the comfort level of the three-level indoor environment_x000D_Indoor temperature, test range 0--50C, outdoor temperature, test range -50C-70C_x000D_.Indoor and outdoor humidity detection range: 2099_x000D_Indoor and outdoor temperature indication and humidity change trend._x000D_Record the highest/lowest indoor and outdoor temperature and humidity_x000D_When 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 patent_x000D_Temperature and humidity calibration function_x000D_time and date display_x000D_Notice:_x000D_Actual color may be slightly different from the image due to different light effect_x000D_Please allow 1-3cm deviation due to manual measurementNet weight: 267g_x000D_Gross weight: 380g_x000D_Size: 12.5*2*12.5cm_x000D_Accessories list: temperature and humidity meter*1, outdoor unit*3, outdoor unit base*3, USB cable*1, Chinese and English manual*1_x000D_Power supply mode: AAA battery *3 or DC 5V power supply shipment without battery_x000D_Material: ABSPackage List:_x000D_1 Set Wireless Indoor Outdoor Thermometers