Features: High accuracy and wide humidity measuring range. Stable performance, supports long time use. With large and clear display for better readability. Mini size, convenient to carry. Specifications: Model: XH-W3005 Working voltage: 12v, 24v, 220v (optional) Measuring range: 0%~99%RH Humidity control precision: 0.1%RH Measuring accuracy: 2%RH Load-power: 120W(12v)/240W(24v)/1500W(220v) Output type: direct output Installing hole distance: 73mm / 2.87in Item size: 60 * 45 * 31mm / 2.36 * 1.77 * 1.22in Package size: 80 * 60 * 50mm / 3.15 * 2.36 * 1.97in Package weight: 88~95g / 3.1~3.35ounces Instructions: Connect to Power supply, diplay Instructions humidity Set start the humidity: Press the UP button display start the humidity, long press about 3s the start the humidity flashing, then press the UP or Down adjust the set Set to stop the humidity: Press the Down button display Stop the humidity, long press about 3s the Stop the humidity flashing, then press the UP or Down adjust the set Restore the factory Settings: press the UP and Down button at the same time, will display 888 then will Automatically detect the humidity Note: 1.Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2.Please allow a little measuring deviation due to manual measurement. Package List: 1 * Digital Humidity Controller 1 * Humidity Sensor