Usage Tips:Features: Large Color ScreenLarge color screen, which displays more informations you need: Time Calendar Week Comfort Index Pressure Tide Moon phase Indoor outdoor temperature and humidity Weather forecast Trend prediction Local sunrise and sunset and more. Wireless Outdoor SensorWall mount or table stand, 433.92MHZ RF transmitting frequency, 60 meters transmission range in an open area. Up to 3 wireless outdoor sensors can be connected(package include 1 sensor) Switchable FormatTemperature alternatively in Fahrenheit or celsius . Pressure alternatively in inHg or hPamb. Time in 1224HR format.  Dual alarms with snooze function ( OFF or 5 ~ 60min) Brightness Adjustable 5 levels brightness backlight(high low 4 levels, closed) with night mode. Only when the power supply is working can the backlight be turned on continuously. When powered by the battery, the backlight will light up for 15 seconds. Other FunctionsDisplay indoor level 3 mold risk warning and indoor and outdoor level 5 comfort level. Equipped with indoor and outdoor temperature and humidity upper and lower limit alarms and frost point alarms. Widely UsedSuits various scenario like bedroom, attic, garage, pet case, cellar, refrige etc. Note: three sensors can be used at the same time, and one sensor is provided by default for delivery. The single sensor SPU:E23975. Specifications: Perpetual Calendar Up to Year 2099 Days of week in 8 languages: English, French, Italian, Spanish, Netherlands, Danish, Poland, German 6 Weather Forecasts: sunny, cloudy, cloudy, drizzle, rain, snow Indoor Outdoor measurable range: 20percent RH~95percent RH Indoor Temperature Measurement Ranges : -9.9 celsius ~50 celsius 15 Fahrenheit ~122 Fahrenheit Outdoor Temperature Measurement Ranges : -40 celsius ~70 celsius -40 Fahrenheit ~158 Fahrenheit Minimum maximum display for air humidity and temperature Atmospheric Pressure Measurement Ranges : 17.72 inHg to 32.50 inHg(600 hPamb to 1100 hPamb) Power Supply: Weather Station: Battery : 2 X LR03 AAA(not included) , Power input : DC 5V 600mA Wireless Outdoor Sensor: Battery : 2 X LR6 AA(not included) Material: ABS Weather Station Size: 17.2 * 14 * 2.7cm 6.77 * 5.51 * 1.06 inch Sensor Size: 9.7 * 3.2 * 5cm 3.82 * 1.26 * 1.97 inch Package Size: 18.6 * 15.3 * 7 cm 7.32 * 6.02 * 2.75 inch Package Weight: 540g 19.05oz Package List: 1 * Weather Station 1 * Sensor 1 * USB Power Cable 1 * User Manual (ENDEFRITES)