The revised Rapid X is now even brighter! Now pumping out an impressive 50 lumen of 360 degree visible light! The Rapid X may look like a normal Cateye light but this neat compact rear light offers a level of light intensity like no other Cateye; visible from nearly 360 degrees & using a neat band fitting system it can be placed in several different positions on the bike from seat post to seat stays.• Ultra bright strip LED technology• Li-Polymer battery technology up to 50 lumen output• Complex circuitry for safe charge & discharge• USB (Universal Serial Bus) recharge (2hrs)• O-Ring attachment• 5 modes: Constant / Flashing / Rapid / Pulse / Vibration with 5hr / 30hr / 16hr / 16hr / 8hr runtimes • Dimensions: W 22.5 x H 27.2 x L 73.2mm