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Description LCD display screen design, it is easier to read in the dark light conditions. Line of sight wireless transmission in open air is up to 100 meters, 30 meters under most conditions. Compact and portable, easy to use. Wireless outdoor temperature and humidity. Indoor temperature and humidity. One remote sensor included. Free standing or wall hanging. Low power consumption. Specification: Thermo-hygrometer (receiver) size: 75 * 58 * 19mm. LCD Display size: 5.2 * 4.1cm. Thermo-hygrometer sensor (transmitter) size: 75 * 58 * 20mm. Material: plastic. Color: white. Power supply: 2 * 1.5V AAA batteries (not included). Frequency: 433MHz. Update rate: 60 seconds. Indoor Temperature range: 0 ~ +60℃. Temperature accuracy: ±1℃. Humidity range: 10-99%. Humidity accuracy: ±5%. Outdoor Temperature range: -40 ~ +60℃. Temperature accuracy: ±1℃. Humidity range: 10-99%. Humidity accuracy: ±5%. Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package include: 1 * wireless thermo-hygrometer (receiver). 1 * thermo-hygrometer sensor (transmitter). Package Including .