Specifications: Condition: 100% New Humidity range and accuracy: 0%~99%, 2%RH Working temperature: -20~60 Auxiliary power supply: 3V 1000mA, CR2477 button battery Host size: 160 * 23.5mm / 6.30 * 0.93in Auxiliary machine: 45*15mm / 1.77*0.59in Features 1. Digital sensor, more accurate temperature and humidity 2. Automatically obtain weather data and synchronize 3. APP intelligent control, easy operation, rich functions, APP sharing 4. Air pressure/UV/wind speed/temperature and humidity alarm function setting reminder 5. You can view the historical data trend record of temperature and humidity 6. Diversified installation methods make installation easier 7. It can support 3 sub-machines, and take the temperature and humidity of different positions at the same time 8. Display content, you can DIY according to your own preferences 9. The display brightness can be adjusted in 3 gears, and the night mode is added, which does not affect sleep Specification: Name: Smart Weather Clock Material: ABS Input: 100-240V, 50/60Hz Output: 5V/2A Standby current: auxiliary machine about 6uA Standby time: 6 months for auxiliary machines Communication method: Wifi(2.4G)+BLE module Auxiliary communication frequency: 433MHz Auxiliary communication distance: 80M (outdoor open environment) Temperature display unit: / Humidity display unit: RH% Temperature range and accuracy: -20~60, 0.5 Humidity range and accuracy: 0%~99%, 2%RH Working temperature: -20~60 Auxiliary power supply: 3V 1000mA, CR2477 button battery Host size: 160 * 23.5mm / 6.30 * 0.93in Auxiliary machine: 45*15mm / 1.77*0.59in PlugEU plug (or UK plug) Notes: please allow 1-3cm error of measurement. Photo color might be a little different from the actual product due to color display of different monitors. Package included: 1 * Indoor Weather Station Host 1 * Indoor/Outdoor Wireless Sensor Auxiliary Machine 1 * USB cable 1 * User Manual Or Packing included: 1 * Indoor Weather Station Host 3 * Indoor/Outdoor Wireless Sensor Auxiliary Machine 1 * USB cable 1 * User Manual