LCD display screen design, it is easier to read in the dark light conditions. Compact and portable, easy to use. Line of sight wireless transmission in open air is up to 100 meters, 30 meters under most conditions. Wireless outdoor temperature and humidity (°C or °F). Indoor temperature and humidity (°C or °F). Indoor: Temperature range: 0 ~ +60°C Temperature accuracy: ±1°C Humidity range: 10-99% Humidity accuracy: ±5% Outdoor: Temperature range: -40 ~ +60°C Temperature accuracy: ±1°C Humidity range: 10-99% Humidity accuracy: ±5% Color: White Material: plastic Package Contents: 1 x thermometer 1 x outdoor unit 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.