Description: This listing includes: 1 unit of weather station, with sensor (you can choose the quantity of the sensor you need when place the order) Parts list in the standard package as below: QTY ITEM 1 Diplay Console Frame Dimensions (LxWxT): 161.5*86*21.5mm 1 Thermo-hygrometer sensor Dimensions (LxWxT): 122*40*18mm 1 EU Plug Power adapter Remark: the standard packageincludes1 unit of weather station, with 1 sensor, if you need moresensors, you can choose the different colors for different sensor when you place the order. Features: 1.Wirele Frequency: 433Mhz 2. Can receive and display temperature&humidity of 3 channels . (it can connect up to 3 sensors . Sensors are optional. If you need more sensors, you can choose the different color for different quantity of the sensors,price is different ) 3. Calendar and Time display 4.Time alarm with snooze function 5.In/outdoor Temperature/Humidity 6.Temperature unit: C/F selectable. 7.Air Preure 8. Hpa/inhg/mmhg selectable. 9.User accuracy calibration supported: Air preure, indoor and outdoor temperature and humidity can be calibrated manually. 10. Moon phase 11.Dew point for outdoor 12.High/Low records for in/outdoor temperature/humidity 13. acHigh/Mid/Off bklight controlled 14.Automatically to saved user set parameters (unit, calibration data, alarm data...) in to EEPROM. Remark: when AC power adapter is connected, back light is on permanently. When only battery operated, back light is turned on only when button is preed and auto time out is 5s. Specifications: Wirele Frequency: 433Mhz. Transmiion distance in open field: 100 meters.(in the open field, there's no obstacle in between). Temperature range:-40to +60(show OFL if outside range) Resolution: 0.1,accuarcy: +/- 1 Measuring range rel. humidity: 20%95% Resolution: 1%, Humidity accuracy: +/-5% (0-45) Measuring interval thermo-hygro sensor: 48 sec Water proof level: IPX3 Indoor data Indoor temperature range: -10 to +50 Resolution: 0.1, accuracy: +/- 1 Measuring range rel. humidity: 10% ~ 99% Resolution: 1%, Humidity accuracy: +/-5% (0-45) Measuring range air preure:300hPa 1100hPa Resolution/Accuracy: +/- 0.1hPa/1.5hPa Measuring interval:60sec Power: Base station: 5V 0.5A DC adaptor(included) Or 3XAA 1.5V LR6 Alkaline batteries(battery is not included) Remote sensor: 2 x AA 1.5V LR6 Alkaline batteries(not included) (Remark: in the winter, the alkaline batteries may not work in the cold temperature. Lithium battery is recommended).