Brand new Vis 180 degree tail light is the best balance of performance & value you can expect from a rear light on the market Rated at 25 lumens 5 times the output of almost everything else The powerful red light sweeps a broad beam to the back Directional side amber beams alert overtaking cars The tool-less pivot lock mount features multiple locking positions easily attached on seat stay seat post or messenger bag Unique paceline setting for group riding without blinding riders behind Micro USB (Universal Serial Bus) port accepts charging from most mobile phone chargers or any USB (Universal Serial Bus) port Just 3 hour recharge time Li-ion battery Run time High Pulse: 6 hours Low Pulse: 12 hours Solid: 4 hours Flash 20 hours System weight an incredible 60 grams EH8560462A