advantage: 1.it can produce continuous cooling wind to target tissue to minimize pain and thermal injury during laser and ipl treatment, provide temporary relief for cosmetic injections. 2.wind speed cold air and cooling time can be adjusted from level 1-7 and cooling time 1-60 minutes on screen according to patient's comfort. 3.the cooling level can be up to -25 degree, so in actual therapy laser or ipl can use high power to perform high efficient and fast treatment. if you have any any questions, please feel to contact us , we will get back to you within at the first time.