Compact, super lightweight rear bicycle light; Max output of 15-lumens with a 13-hour runtime in Day flash Mode; 6 combined solid and flash output modes, including highly disruptive Day flash mode; Wide Angle Optics provide 270 deg of visibility; Includes versatile silicone rubber mounting strap for quick and secure mounting; USB-C waterproof charging (cable not included); Durable co-molded construction; Rigorously tested to IPX7 Waterproofing standards; 210mAh battery capacity