Replaces traditional hair removal methods such as waxing, shaving, creams, gels and epilators. Easy to have beautiful and silky-smooth skin even at home!Who can use it? Avoid using on naturally dark or recently tanned skin. This beauty tool is ideal for use with lighter skin tones and brown-to-black hair. For additional safety, COSBEAUTY has a built-in smart sensor that detects if skin tone is too dark for treatment and will not pulse if the skin has too much pigment for treatment. When do I use it? You can use it every season. But there are three benefits in winter than in summer. 1.The weaker the ultraviolet rays, the better the effect of hair removal 2.You need not worried about the melanin precipitates in the damaged hair follicles to effect the beautiful appearance. 3.Spending cool summer happily without any pressure thick hair