COOLSMILE ECOSTAR REUSABLE COOLING CORE COOLSMILE Cools One Person on 5 Watts, No Refrigerant BUSAN, South Korea - A South Korean manufacturer has built a personal cooling device that cools one person on 5 watts of power, producing air up to 31 degrees Fahrenheit below the surrounding temperature with no compressor and no refrigerant. Genie Kim 2026.09.04 07:47 PDT
