Usage Tips:This state-of-the art measurement inst ent is engineered and designed to meet the highest quality standards to assure you uncompromising This inst ent will provide measurements of wind speed & direction, wind chill, temperature&humidity. All maximum/minimum data can be recorded and displayed. In addition, the time of recorded data can be displayed as well. 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 or bft (user setting). 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: -4°F to 140°F (-20°C to 60°C) Lithium batteries: -40°F to 140°F (-40°C to 60°C); Resolution (for both indoor/outdoor temperature): ±2°F/±1ºC Temperature accuracy: ±2°F/±1ºC 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 (Approx.) Perpetual Calendar: The hour display format can be set between 12 hour format or 24 hour format. The time zone can be set from-12 to +12(user setting). Daylight saving time is adjusted automatically (The daylight saving time is adjusted on the basis of different time zone). The date display format can be set as: YYYY-MM-DD, MM-DD- YYYY,DD-MM-YYYY (user setting). 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-chill temperature display. Display units options: ºF / ºC (user setting). Dew-point temperature display. Display units options: ºF / ºC (user setting). Material: Plasti