This Vibrating Massage Hair Brush is a unique battery powered massage brush that has many great features: Increased Blood circulation helps remove toxins and micro-pollutants from the hair cell matrix. This brush is a must for those with thinning hair. Enjoy an invigorating massage anywhere. FEATURES: The soft bristle hair brush restores luster and promotes increased blood circulation to your hair follicles, while the opposing side features massage nodes to help to relive light stress and muscle fatigue throughout the day. Battery Operated requires 2 AA size Batteries (Not Included). SPECIFICATIONS: Color: Black. Material: Plastic, Size: 7" x 2" x 2"