Features:HECTO DRIVE 500XL (FRONT) • Max 500 lumens / 20 hour runtime in Femto mode • New housing with stylized heat dissipation fins • Silicon rubber strap • IPX7 water resistant • Integrated USB stick for cable-free rechargingFEMTO USB DRIVE (REAR) • 5 lumens • USB Rechargeable Rear LED Light • Wide angle optics with 270° visibility for maximum safety • Aero seat post compatible, with versatile mounting strap • Lightweight and durable, co-molded design • IPX7 water resistant