Magicshine Tail Light SEEMEE 50 V2.0, Rear Bike Light with USB C Rechargeable, 50 Lumen IPX6 Waterproof Bicycle Tail Lights for Night Riding, Smart Cycling Safety Bike TaillightsAbout this item Safety with PelotonSync Flash: Rear bike light sync up and flash in the same pattern within fractions of a second, adding extra safety and style amidst traffic, the bike tail lights are perfect for cycling activity with your family or friend FTR Intelligent One touch Control: The bicycle tail lights for night riding with FTR LightSync control technology, syncing front and tail lights via a remote for seamless, safer night riding