This smart weather station with clock collects weather data via internet to display weather, information, time, date, temperature and humidity. Each can connect up to three auxiliary machines. Place the slave unit indoors or outdoors, and the collected data will be transmitted and displayed to the master unit indoors. You can also configure and control through your mobile phone, and check indoor/outdoor weather data, temperature history data from APP or indoor . Temperature display unit: C/F Humidity display unit: RH% Temperature range: -20C to 60C Humidity accuracy: 0.5C Humidity range: 0%-99% Temperature accuracy: 2%RH Working temperature range: -20C to 60C Output: USB-A 5V 1A Input: -USB 5V 2A Communication : Wi-Fi (2.4G) + module Auxiliary power supply: 3V 1000mA, CR2477 button battery Current consumption: auxiliary machine 6uA Standby time: auxiliary machine 6 months Auxiliary communication frequency: 433MHz Auxiliary machine communication distance: 80M (outdoor air environment) Plug Type:EU Plug,it applies to Indonesia, Germany, , , Italy and so on Voltage: AC 220V Colour:White Material:ABS Package Contents: 1 x 1 x sensor 1 x European plug 1 x charging 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.