Design FeaturesDry and wet manual scalp massage brush (no battery, waterproof), ergonomically designed handle, easy to grip (whether left or right hand), uneven bristles fit the scalp perfectly MultifunctionalThe shampoo brush allows you to deeply cleanse the hair roots and massage the scalp. Relieve hair loss and promote hair growth. Removes flaking and scales. Relieve stress and relax muscles (never hurt your hair and scalp) Applicable peopleThe shampoo brush is suitable for men, women, children and pets. Also suitable for any type of scalp and hair (coarse or fine, short or long, oily or dry). Pets can also use this brush for bathing or hair removal Portable and ConvenientThe head massager measures 3.7 x 3.1 x 2.8 inches and weighs only 2.3 ounces. Whether you are on the go, at home or at the office, your head can still be massaged and relaxed