HECTO DRIVE 500XL (FRONT* Maximum output of 500 lumens / Battery life of 20 hours in Femto mode* New housing with heat dissipation fins* Silicone strap* IPX7 water resistant* Integrated USB stick for cable-free chargingKTV DRIVE (Rear)* Maximum output of 10 lumens / Battery life of 20 hours in flashing mode* New 400 mAh battery* Wide-angle optics for 270° visibility for maximum safety* Compatible with aero and round seat posts* Lightweight and durable* Co-molded design and IPX7 water resistant