Thermometer Hygrometer Temperature Gauge LCD Digital Display With Built-in Battery Feature:1. Easy measurement: the temperature measurement range is 10 C - 70 C, the error is within 1 C, and the display resolution is 0.1 C.2. Humidity meter: designed to have a wide range of humidity measurement of 10 - 99% relative humidity, meanwhile, the error is less than 5% relative humidity.3. Better Display: LCD screen enables a clear digital display, which will better help you build a more comfortable home.4. Practical Applications: Ideal for measuring indoor temperature, including but not limited to bedroom, living room, etc.5. Free Placement: Double-sided adhesive tape is included, so you can freely position the thermometer wherever you want. Specification: Item Type: Thermometer Battery: 1 x CR2032 200mah Button Cell (Comes with built-in battery). Temperature measurement range: -10 - 70 CTeperature: the error is within 1 C.Humidity meter range: 10 - 99% RHecessity: the error is within 5% relative humidityPackage List:1 x Thermometer1 x User Manual1 x double-sided adhesive tapeHow to use:Use it directly.