The Lezyne Femto Drive USB is a compact, super lightweight USB rechargeable LED cycling safety light. Its durable co-molded construction is minimal and has an IPX7 water resistance rating. A versatile mounting strap quickly mounts to a variety of bar sizes.The custom Wide Angle Optics lens provides 270° of visibility. The Femto USB 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.