the professional skin cooling machine is specially for cooling skin before, during and after using of non-invasive co fractional laser, q switch laser, ipl or diode laser treatment; pain release for patients to avoid any burn or uncomfortable treatment; also efficient pain treatment, it can work with 808nm diode laser hair removal machine, co2 fractional laser machine, shr machine, ipl machine and nd yag laser machine...suitable for all machines if patients feel pain and needs cooling. the skin air cooler adopts a variable frequency air compression fan device to compress the air and then spray cold air through the refrigeration device. the cold air cools the skin to protect the epidermis, reduce pain and enable high energy density without damaging the epidermis..syi