The Femto USB Drive Rear Light combines compact engineering with practical visibility. Its co-molded design withstands the elements with IPX7 waterproof protection, while the Wide Angle Optics lens delivers 270° of illumination across five selectable brightness modes up to 5-lumens. The universal mounting strap accommodates various post diameters for quick installation. With up to 15 hours of runtime per charge and a sealed, threaded composite cover protecting the Micro USB port, this light delivers reliable performance and longevity for daily commuting and recreational riding.