Enfitnix XlitET Bicycle Taillights: Revolutionizing Safety with Intelligent Sensing and Durable Design. Experience enhanced visibility and safety on your rides with the XlitET smart taillight. Its built-in accelerometer detects braking and automatically adjusts illumination, while its powerful 50-lumen output and long runtime ensure you’re seen from afar. Crafted from full CNC alloy and IPX5 waterproof, this taillight withstands rugged conditions. Choose from various lighting modes and enjoy convenient mounting options. USB Type-C charging makes it easy to keep the light ready for your next adventure.