Serfas E-LUME 250 USB HeadLight USL-250

See and be seen! A powerful headlight. True 250 lumen bright white LED. USB rechargeable. CNC aluminum body. 3 level battery life indicator. 1400 mAh battery (easily replaceable at end of life). 5 modes: 250 lumen constant (2 hours), 100 lumen constant (4.25 hours), 50 lumen constant (7 hours), Breathing flash (50 hours), Flashing (18 hours). IPX3 waterproof. Fits up to 35.0 clamp diameter. Includes bar bracket/mount with rubber grommet & charging cable. 142 g.