Usage Tips:Model:ETC-974Temperature measure range: probe :-50~110Celsius(-58~230Fahrenheit)PTC probe:-55~140Celsius(-67~284Fahrenheit)Display resolution:1Celsius/0.1Celsius(with the swithch mode between integer and decimal)Accuracy::±0.5Celsius(-30Celsius~50Celsius);other±1CelsiusPTC:±1Celsius(-30Celsius~50Celsius); other±2CelsiusProbe type :(-50Celsius~120Celsius) ;PTC(-50Celsius~150Celsius)Power supply:230VAC±10% ;50/60HzRated current of the relays(refrigeration ,defrost and fan):8A/220VACUse temperature:-5Celsius~55CelsiusRelative humidity:10%-90%RH (not condensing)Storage temperature:-30Celsius~85CelsiusInput: 2 sensorColour:Black+redMaterial:plasticSize:77x34.5x58mmSensor lenth:2M(include the probe)Package Contents:1 x Temperature Controller1 x probe1 x PTC probeOnly 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.