This instrument measures wind speed & direction, temperature&humidity. All maximum/minimum data can be recorded and displayed. In addition, the time of recorded data can be displayed. The weather alarm can be set separately, any value can be set. The alarm signal lasts 2 minutes. Wind speed and wind direction display. Average wind speed and gusts display. The units can be set as m/s,km/h,mph,knots. Wind speed range: 0 to 50 m/s; Wind direction range:E,S,W,N,SE,NE,SW,NW. Specification: Outdoor Temperature range: Alkaline batteries: -4F to 140F (-20C to 60C) Lithium batteries: -40F to 140F (-40C to 60C); Resolution (for both indoor/outdoor temperature): 2F/1C Temperature accuracy: 2F/1C Humidity range: 20% to 90% Humidity accuracy:5% Receiver: Alkaline battery: 2 AAA 1.5V Wind Gauge Remote Sensor: Alkaline battery: 2 AA 1.5V or AA lithium battery(Not Included) Battery life: 12 months Calendar: The hour display can be set between 12 hour or 24 hour. The time zone can be set from-12 to +12. Daylight saving time is adjusted automatically (The daylight saving time is adjusted on the basis of different time zone). The date display can be set as: YYYY-MM-DD, MM-DD- YYYY,DD-MM-YYYY. Wireless 433 MHZ receiving. Available distance: 328 ft in open field. While receiving RF, press any key to quit. Indoor/outdoor relative humidity (RH %) display. Display range: 20% to 99%. Resolution: 5%. Wind- temperature display. Display units : F / C. Dew- temperature display. Display units : F / C. Material: Plastic colour: White Package Contents: 1 x Professional Wireless 1 x Receiver