Powerful heating Massage, relieve eye strain. RENPHO Eye massage adopts kneading, trigger point therapy, oscillating pressure, and rhythmic percussion massaging. Built-in heating pads provide a comfortable temperature between 104 and 107 degrees fahrenheit(40¡æ-42¡æ), better for relieving eye strain, eye puffiness, dry eyes, sinus pressure, and headaches. Note 1: we do not recommend customers use RENPHO Eye massager if you have cataracts, eye operation, retina condition, etc.