Specification: Indoor/outdoor temperature display. Display units options:F / C(user setting). Indoor temperature range: 32F to 122F (0C to 50C); 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 (Approx.) Station dimension: 20.5 height x 9 diameter Receiver dimensions: 4.9 height x 2.7 width Display dimension: 2.36 height x 1.77 width 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: F / C (user setting). Dew-point temperature display. Display units options: F / C (user setting). 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. 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. Troubleshooting: If the Receiver does not receive a transmission from a remote unit channel for 10 minutes, the wind speed, outdoor temperature and humidity will show dashes. To correct this problem: 1. Go to the remote location of that channel to check that the unit is properly positioned, within the appropriate transmission range. 2. If new batteries are faulty on the initial installation, install fresh batteries. If you did not notice the Low Battery icon warning and the product performed correctly after initial set up, the batteries have lost their charge. Replace the batteries. 3. Check to make sure the transmission path is clear of obstacles and interference.