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