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°C(with the swithch mode between integer and decimal) Accuracy: NTC:±0°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) Power 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 lenth:2M(include the probe) : Temperature Controller Display Type: DIGITAL Usage: Household Power Type: Charger Style: Standing and Wall Hanging Display Size: 1 Inches & Under color:Black Material:plastic size:77 x 34 x 58mm Package Contents: 1 x ETC-974 Digital Temperature Controller Only the above package content, different merchandise usually are not included. Note: Light and different exhibits can cause the colour of the thing within the photo a bit assorted from the real thing. The length allowed error is +/- 1-3cm.