[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 (℃/℉), 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%RH and a temperature control range of -10°C-50°C/14°F-122°F. 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/CLK' and 'MODE' buttons. With a correction range of -10-10%RH for humidity and -9.9-9.9°C 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 durable plastic material for safety and ease of use. This humidity controller is perfect for a variety of settings including refrigerators, incubators, pet reptiles, poultry houses, glass containers, aquaculture, greenhouses, and other areas requiring strict 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 United States, the Philippines,Taiwan and so on. Colour:White Material:plastic Package Contents: 2 x Hygrometer Humidity Control Switch Only the above package content