Model: ETC-974 Temperature measure range: NTC probe: -50-110°C (-58-230°F); PTC probe: -55-140°C (-67-284°F) Display resolution: 1°C / 0.1°C (with switch mode between integer and decimal) Accuracy: NTC: ±0.5°C (-30°C - 50°C); other ±1°C. PTC: ±1°C (-30°C - 50°C); other ±2°C Probe type: NTC (-50°C - 120°C); PTC (-50°C - 150°C) Supply: 230VAC ±10%; 50/60Hz Rated current of the relays (refrigeration, defrost and fan): 8A / 220VAC Use temperature: -5°C - 55°C Relative humidity: 10% - 90% RH (not condensing) Storage temperature: -30°C - 85°C Input: NTC sensor Sensor length: 2M (including the probe) Temperature Controller Display Type: DIGITAL Usage: Household 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 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.