1433MHz wireless transmission, the weather station receives signal from external sensor, up to 328ft transmission distance in open area. 2With alerts function, the weather alarm can be set separately, any value can be set. The alarm signal lasts 2 minutes. 3Dual installation of wind gauge remote sensor, wall hanging or free standing. 5 kinds of weather forecast, such as sunny, overcast, cloudy, rainy, snowy. 4It displays indoor and outdoor temperature/ humidity. C/F unit switchable. Wind speed in mph, km/h, m/s, knots, bft or gust. 5With wind direction (E, S, W, N, SE, NE, SW, NW) display with LCD compass. Radio controlled time and date with manual setting option (DCF, WWVB selectable). 6Wind chill and Dew point temperature display. With check/ clear records, you can view or clear the maximum or minimum temperature/ humidity/ wind speed in the past 20 hours. 7Support time & calendar, perpetual calendar, time in optional 12/24 hour format. Battery powered. Low battery indicator on the receiver. 8Features clear LCD screen to display multiple weather information, is a versatile and necessary tool for you to monitor indoor and outdoor weather. Before you go outside, you can check the weather much more easily. Item Type: Weather Clock Material: ABS Color: Silver Weight: Approx. 1048g / 37oz Application: for Indoor and Outdoor Use Indoor Temperature Range: 0~50 (32~122) Outdoor Temperature Range: -40~60 (-40~140) Temperature Accuracy: 1.0 Humidity Range: 20%-90%RH Temperature Display Unit: / Selectable Humidity Accuracy: 5% Wind Direction: E, S, W, N, SE, NE, SW, NW Wind Direction Accuracy: 10 Wind Speed: 0~50m/s Accuracy: 0.1m/s Wind Speed Unit: m/s, km/h, mph, knots, bft Weather Forecast: Sunny, Overcast, Cloudy, Rainy, Snowy Time Format: 12H/ 24H Transmission Range: 433MHz, about 100m/ 328ft (Open Distance) Power Supply: Receiver: 2 x 1.5V AAA Alkaline Battery(Batteries not included) Transmitter: 2 x 1.5V AA Alkaline Battery or AA Lithium Battery(Batteries not included) 1 x Weather Vane 1 x Base 1 x Fixed Bracket 1 x Sensor(Battery Not Included) 7 x Screw 2 x Screw Cap 4 x Expansion Screw 1 x Remote Control Display(Battery Not Included) 1 x Instruction Manual 1. Please install the receiver's batteries first, before installing batteries in the Wind Gauge Remote Sensor.2. We suggest to use AA 1.5V lithium batteries for outdoor sensor in cold weather climates less than & 8209;10C.3. Though the Wind Gauge Remote Sensor is weather& 8209;resistant, it should never be submerged in water. If extreme weather conditions are likely to occur, temporarily move the transmitter to an indoor area for protection.4. Size and color may be slightly different because of manual measurement and different lighting conditions. Thanks for understanding.