Description: Manual operation. Waterproof, no battery required. Perfect for various hair styles from thick to thin, and no matter wet or dry, even to groom hair of animals. Durable soft silicone with high quality, reduce bacteria, avoid contacting the scalp directly with the nail and scratching the scalp. Triangle brush teeth, better fit the head, can deeply clean the hair roots. Compact size, it fits nicely in the palm of your hand for a firm hold and super lightweight for travelling. Massage and relax your scalp and head, reduce dandruff, help to relieve your tension and daily working stress. Suitable for men, women and kids, and it also appropriate for all hair types. It can be used for scalp scrubbing or body washing massager in shower, or as a scalp massager to massage your scalp, neck or body in a dry state or after shampooing Specification: Material :ABS+ Silica gel Size(LxWxH): Approx.80 x 50 x 40mm/3.1 x 2.0 x 1.6 inch Package Includes: 1x Head Scalp Massager Brush Note: Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!