The Foreo Luna 4 is a smart LED scalp massager. Its T-Sonic massage gently boosts scalp circulation, so your follicles get more oxygen and nutrients for healthier hair. The red LED light strengthens and thickens strands, so they look fuller and are less prone to breakage. And the 395 ultra-hygienic silicone bristles gently clear away oil, sweat and buildup. They even help your serums absorb deeper and better.Good to knowForeo For You app compatible100% waterproof Rechargeable battery100 minutes of runtimeAuto shut-off Lightweight and travel-friendlyCruelty-free and vegan