Hecto Drive 500XL* Max 500 lumens / 20 hours of battery life in Femto mode* Machined aluminum with cooling finsKTV Drive* Max 40 lumens / 45 hours of battery life in Femto mode* Wide angle optics: 270° visibility* Unique design , aerodynamic and compatible with round seat posts* Daytime flashing modes* IPX7 waterproof standards* Integrated USB stick for cable-free charging* Battery capacity 650 mAh (front), 400 mAh (rear)