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 or 0.1°C(with the swithch 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) Power supply:230VAC±10 percent 50 or 60Hz Rated current of the relays(refrigeration ,defrost and fan):8A or 220VAC Use temperature:-5°C-55°C Relative humidity:10 percent -90 percent RH (not condensing) Storage temperature:-30°C-85°C 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 and 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.