Digital thermohygrometer with 3 remote sensors of 100m sensing range without obstacle, it's accurate and can be widely used indoors and outdoors. A perfect choice of temperature and humidity monitoring for baby room, bedroom, study room, office, greenhouse, wine cellar, warehouse, etc. Features: This thermohygrometer clearly displays indoor/ outdoor temperature, humidity, trend indication and comfortable level. ℃ or ℉ temperature display unit switchable. The main unit supports up to 3 remote sensors for stable transmission with the distance of maximum 100m (328ft) without obstacle. Data of 3 channels can be displayed on the screen at the same time. Large digital screen with backlight, more intuitive, clear at a glance; the backlight will auto off to save power. The main unit is powered by USB cable or 3 AA batteries; each sensor is powered by 2 AAA batteries. (Batteries NOT included) Recording function of the maximum and minimum indoor/ outdoor temperature and humidity; 24-hour automatic clear function of the maximum and minimum values. Indication function of indoor and outdoor low voltage. Suitable for indoor and outdoor places such as bedroom, baby room, office, greenhouse, wine cellar, warehouse, etc. Easy installation, tabletop, magnetic adsorption, or wall hanging design. Note: 1. Do not place the product in a place with high temperature, humidity, much dust or corrosive gas to avoid damage to electronic components. 2. Size and color may be slightly different because of manual measurement and different light conditions. Thanks for understanding. Specifications: Color: White Material: ABS Indoor Temperature Range: -20~70℃ (-4~158℉) Outdoor Temperature Range: -50~70℃ (-58~158℉) Humidity Range: 10%-99%RH Temperature Unit: ℃/ ℉ Selectable Temperature Resolution: 0.1℃/ 0.1℉ Humidity Resolution: 1% Wireless Range: about 100m/ 328ft (open distance without obstacle) Power Supply: Main Unit: USB Cable or 3 * AA Battery (Not included); Each Sensor: 2 * AAA Battery (Not included) Thermohygrometer Size: 117 * 113 * 25mm / 4.61 * 4.45 * 0.98in Sensor Size: 83 * 50 * 20mm / 3.27 * 1.97 * 0.79in Package Size: 12.7 * 12.2 * 8.8cm / 5.00 * 4.80 * 3.46in Package Weight: 363g / 12.80oz Package List: 1 * Thermohygrometer 3 * Remote Sensor 3 * Suction Cup 1 * USB Cable 1 * User Manual (English)