Specifications: Product number:-6210 Color: White Material: ABS Host size: 12.5 x 2 x 12.5cm Transmitter size: 5 x 3.7 x 10.5cm Ways power supply: 3 x AAA batteries or DC 5V (battery not included) 1. Can display three channels and indoor temperature and humidity at the same time, three-level indoor environment comfort display 2. Indoor temperature, test range 0--50, outdoor temperature, test range -50--70, 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 humidity 6. Indoor temperature, humidity upper and lower values exceed the limit alarm function 7. Temperature and humidity calibration function 8. Time and date display 9. Can hang and stand 10. Accurate and reliable Package Contents: 1 x Main Weather Station 3 x Wireless Transmitter 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection 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.