[ Humanized Design ] - Backlit blue LCD screen, even in the dark, you can still clearly see the reading. When turning off the power, all settings will be memorized and saved, so there is no need to worry about setting them again the next time you use them. Moreover, there are functions such as target temperature over temperature alarm. [ PID Temperature Control ] - PID temperature controller adopts proportional calculus algorithm for temperature control, which can keep the temperature at a certain point for linear control. During temperature control, the output heat is relatively linear by controlling the increase or decrease of current, without sudden cooling or heating of equipment. [ Split Time On and Off ] - Two groups can be set up within 24 hours. For example, if you want the lighting to turn on between 0:00 to 4:00 and 18:00 to 22:00 and turn off at other times, simply set L1 From to 0:00 and L1 to 4:00; L2 from=18:00, L2 to=22:00. Widely used for controlling equipment such as insulation boxes, fans, radiators, and oxygen pumps. [ Day Night Temperature Control ] - Temperature control range: 0-50 ?. Two different temperatures can be set for dual time cycling within 24 hours during the day and night. If you want to keep the temperature of the vivarium at 21 ? between 6:00 and 19:00, and at 24 ? between 19:00 and 6:00, simply set the daytime temperature to 21 ?, the daytime start time to 6:00, the nighttime temperature to 24 ?, and the nighttime start time to 19:00. [ Dual Relay Output ] - Digital dimming thermostat & day - night timer, one output for PID controlled heating, the other output for timer control. Integrated design with day/night temperature and timing control, which can meet the physiological needs of temperature, and lighting for reptiles, amphibians, or plants.