Packed in a sleek profile that complements your road bike, the Hotrod 50(TM) unleashes a powerful 50 lumens of radiant wide coverage. Its 6 attention grabbing modes keep motorists aware of your presence any time you&&';;re on the road. Its Versatite(TM) flexible mount lets you attach the Hotrod 50(TM) tail light to most seat posts and seat stays, including aero styles. Performance - Powerful 50 lumens flashing - Low profile, compact size - USB rechargeable Li-ion battery - Low battery indicator - Water resistant design - 1:30 ~ 100 hr run time Technology and Safety - 6 modes: High Flash - SteadyPulseA(R) - Zoom - Group - Low Flash - High Steady - SteadyPulse&';s steady beam helps motorists better gauge their distance from you while the overlapping pulses keep them alert of your presence - Sturdy and flexible Versatite(TM) mount attaches to most seat posts and seat stays, including aero styles Specs: a OUTPUT:- 50 lumens flashing a TOTAL MODES:- 6 a RUN TIME:- 1:30 ~ 100 hours a CHARGE TIME:- 3 hrs a MOUNTING:- Flexible mount for seat post/seat stay a BATTERY:- Built-in Li-ion a SYSTEM WEIGHT:- 29 g In The Box: This product includes: a Hotrod 50 tail light, micro USB charging cable, flexible mount