Main function and features:Control modes among refrigeration ,defrost and fan; User menu and administrator menu are separately set,convenient for operation and provide enough space for the adjustment of high-level management; Return difference to control trmperature;switch between Celsius and Celsius;Resoulution of temperature display is 0.1; Multi-protection and alarming mode optional; Specifications: Model:ETC-3000 Temperature measure range: -45.5~120Celsius Temperature controlling range: -45.5~110Celsius Power supply:220VAC±10% Relay capacity of compressor:8A/220VAC Relay capacity of fan and defrost:8A/220VAC Input: 2 sensor Sensor lenth:2M(include the probe) Digital display:Three-digit LED + Minus digit + Status indicator light (Set;Refrigeration;Defrost;Fan) Colour:Black Material:ABS Package Contents: 4 x Temperature Controller 8 x sensor 4 x Manual (English) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.