Prospera s massage hairbrush is fashionably designed to improve scalp health and hair appearance. Details• Powered by alkaline 2AA batteries (not included), it s safe to use routinely. • It has 108 replaceable teeth, washable to keep them clean. • Far infrared light wave to treat hair, and also, help to reduce dandruff.• Vibration massage to improve scalp blood circulation, make hair more beautiful • Two operation modes: vibration and infrared massage for you to choose from. Infrared for scalp treatment and blue light helps follicle growth.Product Specifications• Replaceable and washable nylon comb • Vibration: 9700RPM • Infrared wavelength: 660nm• Blue light wavelength: 470nm • Made from green material • Measures 9”x 2”x 1.5”, • Weighs 5.2 oz