The Femto USB Drive Rear is a compact and lightweight USB-rechargeable LED cycling taillight. Its durable co-molded construction is minimal and has an IPX7 waterproof rating. A versatile mounting strap quickly mounts to a variety of post sizes. Five output modes offer up to 5-lumens and the custom Wide Angle Optics lens provides up to 270° of visibility. The Femto USB Rear can run for up to 15 hours and is easily rechargeable with the included Micro USB cable. A secure, threaded Composite Matrix cover keeps the USB port clean and sealed. The Femto USB is perfect for commuters and recreational riders looking for a simple and inexpensive way to add visibility.