The Latest and Upgraded 6-in-1 Age-R Booster Pro High-Tech Device: Achieve your skin goals with innovative technology. Don't need a conductive gel: Just use it with your skincare products! Bootser Pro will be the game changer in your skincare routine that makes your skin healthy and glowy Skin-contact sensor for personalized and safe: Equipped with a skin contact sensor that emits LED light only when it touches the skin.