Model: ETC-974 Temperature measure range: NTC probe:-50-110C(-58-230F); PTC probe:-55-140C(-67-284F) Display resolution: 1C/0.1C(with the swithch mode between integer and decimal) Accuracy: NTC:0.5C(-30C-50C);other1C. PTC:1C(-30C-50C); other2C Probe type: NTC(-50C-120C); PTC(-50C-150C) Power supply:230VAC10% ;50/60Hz Rated current of the relays(refrigeration ,defrost and fan):8A/220VAC Use temperature:-5C-55C Relative humidity:10%-90%RH (not condensing) Storage temperature:-30C-85C Input: NTC sensor Sensor lenth:2M(include the probe) Theory: Temperature Controller Display Type: DIGITAL Usage: Household Power Type: Charger Style: Standing and Wall Hanging Display Size: 1.9 Inches & Under color:Black Material:plastic size:77 x 34.5 x 58mm Package Contents: 1 x ETC-974 Digital Temperature Controller Only the above package content, other products are not included. Note: Light shooting 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.