... Switch between C and F, temperature controlling, auto and manual defrosting STC-500 Microcomputer Temperature ControllerMain functions:Intelligent control compressor directly ... between °C and°F, temperature controlling, auto and manual defrosting, light control, dual control of temperature and time when defrost ends, ... range: -45°C~+45°C(-40°F~+120°F)Temperature controlling range: -45°C~+45°C(-40°F~+ ...