Inkbird Temperature Controller ITC-308 Heating Cooling Temperature Regulator / ITC-310T-B 12-periods Timer Stage Digital Heating&Cooling Pre-wired Temperature Controller / ITC-306T Thermostat Heating Only 2 Different Temperatures Functions of Dual Time cycle Setting During 24 hours Breif Introduction for 3 Types of Thermostat: ITC-308 (Heating&Cooling ) (1) Plug and play design: easy to use; (2) Dual relay output be able to connect with refrigeration and heating equipment at the same time; (3) C/F Unit Support reading with Centigrade or Fahrenheit unit; (4) 220V Maximum Output Load: US Version: 1000W(110V)/ EU/UK/AU Version2000W(220V); (5) Dual display window: be able to display measured temperature and set temperature at the same time (6) Support Temperature calibration; (7) Compreor delay protection: for refrigeration control; (8) Alarm: Support High and low temperature alarms; Over-temperature and sensor fault alarm; (10) Heating/Cooling differential function could be set separately: for refrigeration and heating to protect temperature controller from violent change. For ITC-310T-B ( 12-periods Timer Stage Heating&Cooling) (1) 12 periods of time: 12 temperatures in 12 periods of time and the timers start when the setpoint temperature is reached (2) Can be set single or cycle control mode: wider time setting range: 1~999(min/hr), 1~90(days) (3) F/C degree display: Easy to set, PV and SV dual display windows (4) Maximum output load: 2400W(240V); Alarm when over-temperature and sensor error (5) Dual relay output: be able to connect with refrigeration and heating equipment at the same time. Dual display window, be able to display measured temperature and set temperature at the same time For ITC-306T Thermostat (Heating only 2 Different Temperatures with Dual Time cycle Setting ): (1)Temperature Control Mode: On/Off Control. Please note it is only heating controller without cooling function. Both of the plugs can control the heating. But totally could not over 1200W. (2)Dual time cycle setting during 24 hours: can be set different temperature from day and night on the basis of the physical needs of animals and plants. (3)Maximum output load: 220V. (4)Temperature calibration; (5)Alarm: Over-temperature and sensor fault alarm (6)Dual display window: be able to display measured temperature and set temperature at the same time; (7)Plug and play design, easy to use: Support reading with Centigrade or Fahrenheit unit