• The humidity controller ranges from 5 to 99.99% RH
• It's a digital humidity controller, easy to read; Accuracy: plus or minus 3% RH
• Designed for use in a mushroom, grow tent, or greenhouse; It also works as a reptile humidity controller
• You could plug a greenhouse humidifier or a grow tent humidifier, and a dehumidifier for a grow tent
• Switch the modes between humidification and dehumidification automatically; Supports calibrate the humidity accuracy
• Alarms when sensor error or humidity reaches the preset high or low level