【Dual temperature controller】 This digital dual temperature controller can control 2 devices simultaneously with independent probe and output. Temperature control range: -50~120℃. Max Output: 10A 230Vac (recommended load current should not exceed 5A). The output 1 and output 2 have power output directly when it works, please cut off the power when installation and uninstallation. 【Easy to program】 Set start temperature and stop temperature, this temperature controller will start to work in heating or cooling mode. You can set compressor delay start time to protect the cooling device, set high or low temperature alarm value for safe use. 【Heating and cooling mode】 When set start temperature is higher than stop temperature, KT99 temperature controller works in cooling mode, and when set start temperature is lower than stop temperature, KT99 works in heating mode. 【Dual 1.5m waterproof NTC 10K probes】 This temperature controller thermostat has two 1.5m NTC 10K probes made in TPE material and NTC 10K thermistor, which is professionally waterproof that can be placed in water for long time, perfect for aquarium and fish tank. 【More functions】The temperature can be calibrated if needed. This digital temperature controller can be reset as needed and has power-off data storage function that all parameters setting can be saved after short circuit or power off. It can be used for aquarium, incubator, freezer, refrigerator, fridge, fermentation, and other temperature-controlled system.