Working conditions： - Power supply : 230VAC±10% 50/60Hz - Rated current of the relays (refrigeration, defrost and fan) : 8A/220VAC - Use temperature : -5℃～55℃ - Relative humidity : 10%～90% RH (not condensing) - Storage temperature : -30℃～85℃ Specification： - Product : Length 77 x Width 34.5 x Depth 58 (mm) - Mounting size : Length 71 x Width 29 (mm) - Probe wire length : 2M (including the probe) Technical parameters: - Temperature controlling range : NTC probe: -50...110℃ (-58...230°F) PTC probe: -55...140℃ (-67...284°F) - Display resolution : 1℃/0.1℃ (With the switch mode between integer and decimal) - Accuracy : NTC: ±0.5℃ (-30℃-50℃), others, ±1℃ PTC: ±1℃ (-30℃-50℃), others, ±2℃ - Probe type : NTC (-50℃～120℃) PTC (-50℃～150℃)