*Efficient Chip on Board (COB) LEDs are designed to provide maximum brightness level for up to 90% of the battery burn time for each mode *Attract attention with 8 preprogrammed light modes: max, mid, steady pulse, flash, rolling flash, side flash, disco flash and eco flash *Program additional settings-or remove light modes you&';re not using-with the Knog Modemaker app *Plugs directly into USB ports so you can recharge even without an extension cable *100% waterproof so you can ride without worrying about the elements *Magnetic mount attaches to your bike tool-free with removable silicone straps that fit handlebars and seatposts of 22-32mm diameter *Accessories included: standard magnetic mount, aero mount and 3 interchangeable silicone straps *Charge time: 4 hrs. (LED will turn off when fully charged)