Usage Tips: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-3000Temperature measure range: -45.5~120Celsius Temperature controlling range: -45.5~110Celsius Power supply:220VAC±10%Relay capacity of compressor:8A/220VACRelay capacity of fan and defrost:8A/220VACInput: 2 sensorSensor lenth:2M(include the probe)Digital display:Three-digit LED + Minus digit + Status indicator light (Set;Refrigeration;Defrost;Fan)Colour:BlackMaterial:ABSPackage Contents:1 x Temperature Controller2 x sensor1 x Manual (English)Only the above package content, other products are not included.Note: Light 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.