Model:ETC-974 Temperature measure range: NTC 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:NTC:±0.5Celsius(-30Celsius~50Celsius);other±1Celsius PTC:±1Celsius(-30Celsius~50Celsius); other±2Celsius Probe type :NTC(-50Celsius~120Celsius) ;PTC(-50Celsius~150Celsius) Power supply:230VAC±10% ;50/60Hz Rated current of the relays(refrigeration ,defrost and fan):8A/220VAC Use temperature:-5Celsius~55Celsius Relative humidity:10%-90%RH (not condensing) Storage temperature:-30Celsius~85Celsius Input: 2 NTC sensor Colour:Black+red Material:plastic Size:77x34.5x58mm Sensor lenth:2M(include the probe) Package Contents: 4 x Temperature Controller 4 x NTC probe 4 x PTC probe 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.