Waterproof scalp wash brush with a vibration of 7200 times per minute to stimulate the scalp, featuring an easy-to-use switch. Purchase date: June 2025 - Model name: Scalp Wash Brush - Color: Pink - Function: Waterproof - Usage: Easy-to-use switch - Vibration frequency: 7200 times/minute - Brush type: 41 protrusions Although unused, it has been opened, so it is listed as "like new." Thank you for your understanding and purchase. Thank you for viewing.