1. Can display three channels and indoor temperature and humidity at the same time, three-level indoor environment comfort display2. Indoor temperature, test range 0Celsius--50Celsius, outdoor temperature, test range -50Celsius--70Celsius,3. Indoor and outdoor humidity, detection range: 20%-99%4. Indoor and outdoor temperature and humidity change trend indication.5. Record indoor and outdoor temperature, maximum/minimum humidity6. Indoor temperature, humidity upper and lower values exceed the limit alarm function7. Temperature and humidity calibration function8. Time and date display9. Can hang and stand10. Accurate and reliableWays power supply: 3*AAA batteries or DC 5V power supplyColour:blackMaterial:plasticPackage Contents:1 x Main Weather Station3 x Wireless Transmitter1 x English manual1 x USB CableOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.