Three Dragged Multi-Function Wireless Thermometer And Hygrometer Indoor And Outdoor High-Precision Thermometer With Color Alarm 1. Weight: 267 grams 2. Dimensions: host: 12.5x12.5x2.5 cm; slave: 10x3.5x1.2 cm (without base) 3. Power supply mode: The host can use 3 x AAA batteries (not included) or DC5V power cord to supply power 4. Calibration function, during use, it is considered that there is more standard temperature and humidity data, and calibration can be set accordingly 5. When the temperature and humidity exceed the set upper and lower limits, the receiver will send out corresponding color alarms and beep beeps. 6. Other functions: backlight memory function comfort icon time calendar display upper and lower limit alarm trend arrow indication maximum and minimum 7. Measurement parameters: -Indoor temperature: 0-50 degrees Celsius, measurement accuracy +-1 -Outdoor temperature: -50-70 degrees Celsius, 0-40 degrees Celsius, measurement accuracy within the range of -10-0 degrees Celsius +-1; 40-50 degrees Celsius, -30-10 degrees Celsius, +-1.5; 50-70 degrees Celsius, -50-30 degrees Celsius, +-2 -Indooroutdoor humidity: 20%-99%