KTV Drive Front* Max 200 lumens / 40 hours runtime in Flash mode * Durable co-molded rubber body* Patented 2-in-1 clip and strap mounting systemKTV Drive Rear* Max 40 lumens / 45 hours runtime autonomy in Femto mode* Compatible with round and aerodynamic seat posts* Wide-angle optics: 270° visibility* Integrated USB key for cable-free charging* Daytime flashing mode* IPX7 waterproof standards* 400 mAh battery ( front and rear)