Measures indoor and outdoor temperature, humidity, air pressure, dew point. Wind speed, wind chill, wind direction, UV index illumination (LUX), weather trend forecast, moon phase, rainfall. Indoor receiver, ultra-thin body, 5.9-inch display area. 1 hour, 24 hours, week, month and total. Time, time/week and calendar display, alarm. Low voltage prompt, outdoor unit can be powered by battery or solar. Indoor unit can be wall-mounted or desktop. WiFi connection to upload weather data to wunderground or weathercould. Outdoor temperature range: -40 to +60/F Indoor temperature range: 0 to +60/F Temperature accuracy: 1C Humidity range and accuracy: 10%-99% (1% resolution); accuracy: 5% Air pressure range and accuracy: 300 to 1100hpa; 3hpa Rainfall display: 0 - 9999mm Rainfall accuracy:Less than 15 mm: 1 mm; 15 mm to 9999 mm: 7% Wind speed range and accuracy: 0-50m/s UV index: 1 to 15+ Illumination: 0 to 200,000 lux Wind direction accuracy: 360 degrees Sampling time: 60s Wifi standard: 802.11 b/g Wireless frequency: 2.4GHZ WIFI transmission distance: 20m Receiver power:3 x AA alkaline batteries or 5.9V/500mA power adapter (batteries not included in delivery) Transmitter power:3 x AA alkaline batteries (batteries not included in delivery) Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on. Voltage:AC100-240V Colour:As Shown Material:ABS Package Contents: 1 * Weather station (indoor unit) 1 * Outdoor sensor (outdoor unit) 1 * Power adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.