USB Rechargeable, super bright, compact, quick and easy - there's no reason not to grab a pair of ORB's for your next ride. Features - USB rechargeable - Simple,lightweight, and compact design - Easy installation and switch operation - Universal rubber band - Mount size: ~22-32mm Modes/Run Time - Constant: 2.5 hours - Rapid flashing: 5.5 hours - Slow flashing: 6 hours