KTV Drive Front* Maximum output of 220 lumens / Runtime of 20 hours in flashing mode (Front)* Maximum output of 10 lumens / Runtime of 20 hours in flashing mode (Rear)* 400 mAh battery* Very remarkable daytime flashing mode* Key Built-in USB for cable-free charging* Lightweight, durable construction* IPX7 water-resistant, co-molded design* Clip-on or strap mounting options* Wide-angle optics for 270° visibility for maximum safety* Rear light compatible with aero and round seat postsKTV Pro Smart* Max 75 lumens / 20 hour runtime in Flash mode. * New 400 mAh battery* Wide angle optics with 270° visibility for maximum safety.* Aero and round seat post compatible.* Lightweight and durable* IPX7 water resistant co-molded design.* Modes can be customized through phone app