Features: Fast response, high sensitivity, simple operation, and provide updated and accurate readings. With memory function, it can record the highest and lowest temperature and humidity. You can view historical temperature and humidity data. Multiple installation methods. This thermometer adopts desktop, wall and magnet design, easy to install, suitable for all types of rooms. Large LCD screen, easy to read data, backlight and touch screen, backlight on/off, easy to read in the dark. The transmitter is equipped with hanging holes for easy placement. It can be hung on a wall or tree, or placed in a baby room, bedroom, warehouse or greenhouse. Specifications: Type: w/1 and w/3 Transmitter (optional) Material: ABS Transmitter waterproof: IPX4 Indoor temperature range: -4°F-158°F (-20°C-70°C) Outdoor temperature range: -40°F-158°F (-40°C-70°C) Humidity range: 20%-95% Comfort display: dry, comfortable, moist Temperature display unit: °C/°F optional (default: °C) Temperature resolution: 0.1°C/°F Humidity resolution: 1% Refresh rate: 10 seconds. Error: temperature plus or minus 1℃, humidity plus or minus 5% Refresh rate: 10 seconds Radio Frequency: 433 MHz Wireless receiving range: 60 meters/197 feet Power supply: AAA battery (not included) Item size: Host: 114*96*24mm/4.5*3.8*0.9in Transmitter: 100*35*20mm/3.9*1.4*0.8in Product weight: Host: 142g Transmitter: 40g Packing size: 155*135*33mm/6.1*5.3*1.3in Package weight: 232g Packing list: 1 * Digital Thermometer 1 * Transmitter 1 * User Manual