Cygolite Expilion 700 Lumen USB Rechargeable Bicycle Headlight, Black, One Size Class leading 700 lumens, integrating industry's brightest Cree XM-L LED with optimized reflector for wider beam spread and greater distant throw Quick-release Li-ion battery stick can be swapped on-the-fly for extended run times, charging & low battery indicator on button for easy reference Steady Pulse alert w/ flashes while constantly lighting the path Compact (140 g) , water resistant, & USB rechargeable with internal Li-Ion battery to eliminate cable clutter Includes headlight, internal Li-Ion battery stick, USB charger, Lock-tite handlebar mount and helmet mount