Circulation Type Closed circulation Operational Ambient Temperature 5 to 35C Operating Temperature Range -20C ~ Room temperature Cooling Capacity ~450W (385Kcal/h) at Liquid Temp. 10C ~360W (380Kcal/h) at Liquid Temp. 0C ~270W (230Kcal/h) at Liquid Temp. -10C Temperature Control Refrigerator on/off control Temperature Sensor T-Thermocouple (with SUS Protection Tube) Temperature Setting / Display Digital setting / LED display Refrigerator Air cooling, 450W Coolant R404A Circulation Pump Magnet pump 10/15W Circulation Capacity (50/60Hz) Max. flow rate 6.3/7.2L/min Pump max. flow rate 12.8/14.3L/min Max. lift 4.0/5.6m Pump max. lift 4.1/5.7m Cooling Coil Nickel plated copper