Inkbird 110V Pre-wired Programmable Digital Heat Cool Temp ControllerSockets Outlet Thermostat ITC-308S with removable Rubber Waterproof Probe Features - Plug and play design, easy to set and use,F/C degree display; - Dual relay output, be able to connect with refrigeration and heating equipment at the same time; - PV and SV dual display window, be able to display measured temperature and set temperature at the same time; - Support reading with Centigrade or Fahrenheit unit; Maximum output load: 2400W(240V); - Compressor delay protection for refrigeration control High and low temperature alarms are available; - Over-temperature and sensor fault alarm Temperature calibration; - Heating/Cooling differential function could be set separately for refrigeration and heating to protect temperature controller from violent change. - The sensor is waterproof and is better for the freshwater tank than the saltwater tank. Specification - Temperature Control Range : -50~99°C / -58~210°F - Temperature Resolution: 0.1 °C / 0.1°F Temperature Accuracy: ±1°C (-50 ~ 70°C) / ±1°F (-50 ~ 160°F) - Temperature Control Mode :On/Off Control, Heating and Cooling Input Power: 100-120 VAC, 50Hz/60Hz - Temperature Control Output: Max. 10A, 100V ~120V AC - Buzzer Alarm: High and Low - Socket: 112 x 46 x 27 mm( 4.1 x 1.8 x 1.0 inch) - Sensor Type: NTC sensor (Including) Sensor Length: 2m / 6.56ft - Ambient Temperature: -30~75°C / -22~167°F - Storage Temperature: -20~60°C / -4~140°F - Humidity 20~85%Rh (No Condensate) - Warranty: 1 Year How to work: - Connect with a heater and a cooler , heating socket for heater,cooling socket for cooler. - The temperature range you want to control is: 22~30℃ ,then you can set TS=25℃, HD=3,CD=5. - When Ambient Temperature is higher than 30℃(TS+CD), it will turn on the cooler, turn off at 25℃. - When Ambient Temperature is lower than 22℃(TS-HD), it will turn on the heater, turn off at 25℃. Package Include - 1x ITC 308 Temperature Controller with 6.65ft Rubber Waterproof Sensor - 1x English User Manual