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); ±1°C (other ranges) PTC: ±1°C (-30°C ~ 50°C); ±2°C (other ranges) Probe type: NTC (-50°C ~ 120°C); PTC (-50°C ~ 150°C) Power supply: 230VAC ±10%; 50/60Hz Rated current of the relays (refrigeration, defrost, and fan): 8A/220VAC Operating temperature: -5°C ~ 55°C Relative humidity: 10%–90% RH (non-condensing) Storage temperature: -30°C ~ 85°C Input: 2 NTC sensors Color: Black + red Material: Plastic Size: 77 x 34.5 x 58mm Sensor length: 2m (including the probe) Package Contents: 1 x Temperature Controller 1 x NTC Probe 1 x PTC Probe Note: Light and display differences may cause slight color variation between the product image and actual item. Measurement error allowance is +/- 1-3cm.