High accuracy and fast refresh rate: Comes with a separate probe sensor for humidity and temperature, and 18 large sensitive holes, measuring changes for 10 seconds in real time. You can get a clear reading at a glance on the large LCD display! And the temperature is / selectable with one press of the black button near the battery slot. Touch Sensitive Backlight: The digital thermometer hygrometer features a touch-sensitive backlight button on a sleek, slim bezel directly below the bright display to easily turn on the backlight in dark conditions. Useful air comfort indicator: The indoor thermometer and humidity meter actively displays the current Comfort status - Dry, Comfort, Wet - you can get the current air condition at one quick glance. This room thermometer hygrometer is specially designed for you to monitor the humidity and temperature levels to achieve a better comfort state. 3 Mounting options: Table/Magnetic Back/Hanging Hole - The hygrometer stands on its own using a flip-down handle on the back, and can be mounted on the wall with a small brad/nail, or hold it with a magnet. You can place the wall thermometer wherever you want, e.g. in the living room, children's room, kitchen, greenhouse, guitar room, office, basement, etc. Specifications: Dimensions: 8.5 x 6.5 x 2.5 cm Power supply: 2 x AAA Battery (Included) Temperature range: -4F 158F(-20C 70C) Temperature accuracy: 1.8F Humidity range: 10% 99% Humidity accuracy: 5% (range 30%70% RH) Refresh rate: 10 sec Comfort index: Dry, Comfort, Wet Before first use: 1. Insert or replace battery: Insert two AAA batteries with the correct polarity （） and （-） as indicated. 2. Do not immerse the body of the product in water. Humidity/Temperature Monitor Care: 1. Do not leave exposed to extremely high or low temperatures as this will damage electronic parts and plastics. 2. Remove the battery if the device is stored for more than four months.