[Measurable temperature range] -50~+70, temperature measurement accuracy: 1.0. [Humidity measurement range] 10%~99%RH, humidity measurement accuracy: 5%RH (room temperature 25). Battery1* LR44 button battery. Mini circular temperature and humidity measuringinstrument, suitable for various scenarios. [Thermometer and Hygrometer] This portable thermometer and hygrometer measures indoor humidity and temperature to help you know the indoor air condition. [Widely used] LCD digital thermometer and hygrometerare very popular and widely used in living room, greenhouse, instrument room, wine cellar, wine cellar, warehouse, granary, baby room, cloakroom. Product Product Features: 1. Small size, beautiful design, easy to carry, and versatile.2. With digital thermometers and hygrometers, you can always keep up-to-date with your indoor climate. Voltage: DC1.5V (one AG13 button battery, not included) Quantity shipped: 3 pieces Package Contents: Only the above package contents, excluding other products. Size: 45*45mm (Reminder: The size is measured by hand, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.) JINYI