Tourmaline contained in brush to strengthen your scalp health and shiny hairnPerfect grip handle to fit in the palm of your hand comfortably. (Perfect Waterproof)nStrengthen the roots of your hair and nourish the hair shafts.nStimulate blood and air flow to the scalp and oil glands.nStimulating Scalp Massager with Plastic case. (Amazon Prime Shipping US)nHair type : All Hair types / Color : Black / Brush : Soft Anion Silicon Tourmaline contained / Shipping : Amazon Prime Shipping / This Rolencos Hair Scalp Brush is manual and does not require a battery. (no electric massager)