Compact, super lightweight USB rechargeable LED cycling safety light that is perfect for commuters and recreational riders looking for a simple and inexpensive way to add visibility Durable co-molded construction is minimal and has an IPX7 water resistance rating Versatile mounting strap quickly mounts to a variety of bar sizes Five output modes offer up to 5-lumens and the custom Wide Angle Optics lens provides well over 180? 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 Black 5 Rear Silicone Strap USB 5