MICRO DRIVE 600XL (FRONT)* Max 600 lumens /44 hour runtime in Femto mode * New housing with stylized heat dissipation fins* Silicon rubber strap* IPX7 water resistant* Integrated USB stick for cable-free rechargingKTV DRIVE (REAR)* Max 10 lumens / 20 hour runtime in Flash mode* New 400 mAh battery* Wide angle optics with 270å¡ visibility for maximum safety* Aero and round seat post compatible* Lightweight and durable* IPX7 water resistant co-molded design