Features: There is an essence compartment in the middle of the brush, which can help you apply essential oil evenly and easily while massaging your scalp. Tooth tip massage: Massage relaxes the head muscles and continuously removes debris, dirt and oil from the scalp. You just move it to different parts of the scalp and the bristles do all the work. It feels like continuous pinching and releasing in a pleasant way. It feels especially good to massage the back of the scalp and around the nape of the neck. Waterproof, no problem rinsing, super waterproof performance, clean, hygienic, unobstructed, safe and comfortable. Red light acts directly on the dermis to promote the production of collagen and elastin. Regular red light therapy can improve skin elasticity and texture. Perfect for hair care anytime, anywhere, it is a great choice for a thoughtful gift for family and friends on birthdays, souvenirs or Christmas. Description: Material: ABS + Silicone Size: 24 * 9 * 3cm, Input voltage 5V 1A, Working voltage 3.7V 0.2A, Lithium battery: 3.7V 1200mAh, Charging time: 3 hours, Style: Massage liquid guide comb in color box.Note: 1. Due to different light effects, the actual color may be slightly different from the image 2. Due to manual measurement, please allow 1-3 cm deviation