Model: ETC-974 Temperature measure range: NTC probe: -50 to 110°C (-58 to 230°F); PTC probe: -55 to 140°C (-67 to 284°F) Display resolution: 1°C / 0.1°C (switch mode between integer and decimal) Accuracy: NTC: ±0.5°C (-30°C to 50°C), ±1°C (other ranges); PTC: ±1°C (-30°C to 50°C), ±2°C (other ranges) Probe type: NTC (-50°C to 120°C), PTC (-50°C to 150°C) Power supply: 230VAC ±10%, 50/60Hz Rated current of relays (refrigeration, defrost, fan): 8A / 220VAC Operating temperature: -5°C to 55°C Relative humidity: 10%–90% RH (non-condensing) Storage temperature: -30°C to 85°C Input: NTC sensor Sensor length: 2M (including probe) Temperature Controller Display Type: Digital Usage: Household Type: Temperature Controller Style: Standing and Wall Hanging Display Size: 1.9 Inches & Under Color: Black Material: Plastic Dimensions: 77 x 34.5 x 58mm Package Contents: 1 x ETC-974 Digital Temperature Controller Note: Light and different displays may cause the color of the item in the picture to vary slightly from the actual product. The measurement allowed error is +/- 1-3cm.