Cygolite 2014 Hotshot 2W SL USB Rechargeable Tail Light Powerful 2 watt red LED tail light USB rechargeable with charging indicator; Internal Li-ion battery lasts up to 200 hours on a single charge 3 flash modes: Steady &get; Triple &get; Single; with OSP technology to fine tune flash speeds and light mode memory recalls last mode used Water resistant design for all riding conditions Includes Hotshot SL tail light with integrated clothing clip, seat post mount and USB cable for charging