Features: High precision and wide humidity measurement range. Stable performance for prolonged use. Large, clear display for better readability. Mini size, convenient to carry. Specifications: Model: -power: 120W(12v)/240W(24v)/1500W(220v) Output type: direct output Installation 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, display humidity instructions Set the humidity start: Press UP button to display humidity level, long press about 3s to flash humidity level, then press UP or Down button to adjust humidity level. Set to stop the humidity: Press the Down button to display Stop the humidity, long press about 3 seconds to stop the humidity flashing, then press the UP or Down button to adjust the setting. Restore factory settings: Press UP and Down buttons at the same time, the screen displays 888 then automatically detects humidity. Note Due to the screen difference and light effect, the actual color of the item may be slightly different from the color shown in the photos. 2) Please allow a little measuring deviation due to manual measurement. Package List: 1 * Digital Humidity Controller 1 * Humidity Sensor