[Versatile Functionality]Equipped with four operational modes: humidification, dehumidification, heating, and cooling. This device also features a temperature and humidity alarm, calibration options, a reset function, data memory to retain settings after a power outage, temperature unit selection ( or ), and key tone settings, ensuring comprehensive control over your environment. [Precise Humidity and Temperature Control]Manage your environment with a humidity control range of 20-95 percent RH and a temperature control range of -10C-50C or 14F-122F. Easily program start and stop parameters for humidity and temperature, and utilize the alarm function to alert you when levels exceed your preset thresholds, maintaining optimal conditions effortlessly. [Calibration Functionality]Efficiently calibrate humidity and temperature in real-time by holding down the 'UP or CLK' and 'MODE' buttons. With a correction range of -10-10 percent RH for humidity and -9.9-9.9C for temperature, adjustments are simple and precise. Save your settings with a long press of the 'MODE' button once calibration is complete. [Safe and Universal Application]Constructed from plastic material for and ease of use. This humidity controller is perfect for a variety of settings including refrigerators, incubators, pet , poultry houses, glass containers, aquaculture, greenhouses, and other areas requiring humidity and temperature control. [Intelligent Fault Indication]Stay informed with the fault indication feature, which alerts you to sensor disconnections, data range errors, or short circuits on the display. This prompt notification allows for immediate troubleshooting, ensuring continuous, reliable operation of the connected devices. Voltage:AC120V Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan andso on. Colour:White Material:plastic Package Contents: 1 x Hygrometer Humidity Control Switch 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.