Features: With a serum cabins in the middle of the brush, it can help you apply essential-oil evenly and easily while massaging your scalp. Tooth-tip Massage: The massage relaxes the head muscles, andcontinuously removes debris, dirt, and oil from the scalp. All you have to do is move-it to different parts of scalp while the bristles do all the work. It feels like a steady continuous pinching and releasing in a pleasant way. The massage feels especially great around the back of scalp and nape of neck. Waterproof, no problem with rinsing, super waterproof performance, clean, hygienic, unclogged, safe, and comfortable. Red light works right in the dermis to promote enhanced collagen and elastin production. Notice improved skin elasticity and texture with regular red light treatments Perfect for on-the-go hair care, it's an excellent choice as a thoughtful present for family and friends on birthdays, as souvenirs Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Charging time: 3 hours Battery capacity: 500mAh Key position: 4 positions Rated power: 1W Rated frequency: 50Hz Charging voltage: 5V Battery life: 1-3 hours Control mode: key control Interface type: TYPE-C Package List: 1x Red Light Hairbrush