Wireless Weather Station Thermometer TS-6210 Digital Temperature Sensor Hygrometer With 3pcs Remote Sensors Battery Powered Description: Color: White,Black Material: ABS Size: As picture show Ways power supply: 3*AAA batteries or DC 5V power supply Specifications: 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 11.the effective distance:The open distance is 100 meters, and the effective distance (with shelter) is about 30 meters. Package Included: 1 * Main Weather Station 3 * Wireless Transmitter 1 * Manual 1 * USB Cable