I'm selling this as I received it as a gift and haven't used it. Batteries: → Please use a coin-type lithium battery CR 2032. An electric facial cleansing brush with an auto-sensor function, made of skin-friendly silicone material, vibrating at 11,000 times per minute. - Brand: BURU BABU - Model Name: egg - Type: Electric Facial Cleansing Brush - Function: Auto-sensor function - Vibration Frequency: 11,000 times/minute - Material: Silicone - Waterproof: Washable Thank you for looking.