This is a small Digital Thermometer, made of good materials, durable and can be used for a long time. It can test indoor temperature and humidity. Compared with the current key products on the market, the household temperature and humidity meter is easier to read. Features -Color:Black -Material:ABS and electronic components -Size:6.50X6.50X2.80cm/2.55X2.55X1.10in -Voltage: 4.5V. -Temperature range: -10-55 degree centigrade. -Humidity range: 0-100%RH. -Temperature accuracy: +3%RH. -Humidity accuracy: +0.3 degree centigrade. -Power supply: USB. -Manufactured with electronic components and ABS material, you can keep it for a long term. -Compared with the current key products on the market, the household temperature and humidity meter is easier to read. -LCD digital thermometer and hygrometer can be used in incubators, feeding rooms, rooms, hospitals and other occasions. -Small design, easy to put it on table-top. Measure indoor temperature and humidity. -Accurate temperature and humidity monitoring, allowing you to adjust the indoor environment at any time to avoid colds, multi-function thermometer, can display temperature, humidity, time and calendar. Package list: 1 x Hygrometer Thermometer 1 x USB Cable 1 x Introduction Book