COMPACT AND LIGHTWEIGHT DESIGN - The Femto USB-C Drive Rear light is a super lightweight, rear bicycle light that is perfect for commuters and recreational riders. Its compact size makes it easy to carry and mount, ensuring you stay visible on the road HIGH VISIBILITY MODES - Offering a maximum output of 15 lumens with a 13-hour runtime in Day Flash mode, the Femto Rear light features six combined solid and flash output modes. These include the highly disruptive Day Flash mode, making it easy for you to be seen in various conditions WIDE-ANGLE OPTICS - Equipped with Wide Angle Optics, the Femto Drive Rear bike light provides 270-degree of visibility, ensuring you are seen from multiple angles. This feature enhances safety during urban rides, cutting through the landscape in any condition DURABLE AND WATERPROOF - Constructed with durable co-molded materials and rigorously tested to IPX7 waterproofing standards, this light is built to withstand tough weather conditions. The waterproof, threaded Composite Matrix cover keeps the USB-C charging port sealed from dirt and debris EASY MOUNTING AND RECHARGING - The versatile silicone rubber mounting strap allows for quick and secure mounting to various seat post sizes. The light features USB-C waterproof charging (cable not included), making it easy to recharge the 210mAh battery, which provides up to 13 hours of runtime