1. Humidity measurement range is wide, and the control range is from 1%RH to 99%RH. 2. 3-digit LED digital tube clearly displays humidity. 3. Built-in humidity calibration function. 4. Sturdy shell design, waterproof and dustproof. 5. Accurate humidity control, stable performance. Humidity measurement range: 1%-99%RH Humidity control range: 1%-99%RH Power supply: AC 220V 50HZ Sensor type: sensor, line length 1.5 meters Opening size: 70mm-28mm Installation form: embedded The factory batches are different. The words are different, but it does not affect the use Color: black Material: ABS Package Contents: 1 x humidity controller 1 x wired sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.