HTC-2 indoor and outdoor temperature crawling hall temperature table refrigerator thermometer aquarium thermometer dual temperature Size: about 10 * 9.3 * 2.3 cm Functions: dual temperature / humidity display, ℃ /? H temperature switching display, high / low temperature humidity memory function, 12/24 hour clock, hourly time function, daily alarm function, calendar display function Specifications: Temperature measurement range: -20 ℃ + 70 ℃ Temperature measurement accuracy: ± 1 ℃ (1.8? H) Temperature resolution: 01. ℃ (0.2? H) Humidity measurement range: 10% RH ～ 99% RH Humidity measurement accuracy: ± 5% RH Humidity resolution: 1% Use battery: AAA 1.5V notes: 1. Due to the different display and lighting effects, the actual color of the project may be slightly different from the color shown on the picture. Thank you! 2. Due to manual measurement, please allow 1-3mm measurement deviation. Package Included: 1 x hygrometer with probe + instruction manual(Without battery)