84 Massage Nodes, Handheld Head Massager for Hair Growth, Deep Clean and Relaxation. Portable & Rechargeable: The electric hair scalp massager for hair growth is powered by rechargeable lithium-ion battery, so no need to plug in while in use. The massage tool comes with a charging base and a USB charging cable and it lasts for a couple of hours on one full charged. It’s compact, cordless portable design allows you to massage anywhere on-the-go. Waterproof material allows you to use it while taking a shower for a proper scalp massage. The eco-friendly soft silicone heads prevent hair from being pulled or tangled and not hurt your skin. The massage nodes are detachable for easy cleaning.