The hair massager scalp is easy to set up and easy to charge. It feels great. It is very relaxing and distributes a perfect amount of hair oil. High-frequency micro-vibration at 10,000 times/min, scalp massage, improves scalp blood circulation, and facilitates rapid absorption. Way better than using your fingers. Works pretty well to ensure we get good coverage but it does take a little bit to get the oil to come out. Warm energy, infrared red light waves. 625nm low-energy infrared red light waves penetrate the subcutaneous hair follicle tissue layer to supply energy to cells, increase cell activity, and accelerate the absorption of medicinal fluids. The hair oiling applicator distributes a thin layer of the hair growth oil (not included in the package) to not weigh down my hair. Vibrates on my scalp. Uses red light therapy also. IPX5 waterproof rating, no problem with rinsing, super waterproof performance, clean, hygienic, unclogged, safe, and comfortable.