Main Features 1 . Measures local temperature, humidity and preure with sensor located on a cabled pro 2.Allows you to monitor environmental or atmosphere data with free WS View Mobile application by connecting with optional sensors(sold separately): multi-channel temperature and humidity, rain, wind, soil moisture, PM2.5 and so o 3.Streams data to your local WLAN network or Internet based weather services 4.Supports uploads to weather underground, weathercloud and WOW(remark:multi-channel temperature and humidity sensors, PM2.5 sensor and Soil moisture sensor data are not hosted on above listed servers, but they can be viewed via WS View APP when they are in the same WLAN net 5.Small size and compact design 6.Powered by USB connection 7.Accurate: Swi-made sensing component provides reliable, accurate measurements Specification: 1.Base Station Size: 12x35x62mm 2.Frequency: 433Mhz 3.Temperature range:-10C 60C (14F - 140F) 4.Temperature resolution:0.1C, or 0.1F 5. Temperature accuracy:1C 6. Humidity range: 10% ~ 99% 7.Humidity resolution:1% 8.Humidityaccuracy:5% 9.Barometric preure range:300 1,100 hPa (8.85 32.5 inHg) 10.Barometric preure accuracy:5hPa 11.Barometric preure resolution:0.1 hPa (0.01 inHg) Power: DC 5V (remark: there's no power adaptor in the package)