The Femto USB-C Drive Rear is an awesome compact and lightweight LED bicycle taillight that commuters and casual riders love because it's super simple and affordable. It has six different lighting modes, both solid and flashing, and the standout 15-lumen Day flash Mode makes you visible in all sorts of situations. The Wide-Angle Optics give you a 270° view, so others can easily spot you. It's built tough with a co-molded design and has IPX7 water resistance, meaning it'll work great even in bad weather. You can easily attach it to different seat post sizes using a rubber strap, and the waterproof Composite Matrix cover keeps the USB-C charging port clean from dirt. Features include being a compact and lightweight rear bike light, a max output of 15 lumens with a 13-hour runtime in Day flash Mode, six solid and flash modes including a powerful Day flash, and Wide Angle Optics for 270° visibility.

Using this Femto USB - C Drive Rear taillight is a breeze. First, use the rubber strap to securely attach it to your bike's seat post. It fits different seat post sizes, so you don't have to worry about that. To turn it on, just press the button. You can cycle through the six solid and flash modes by pressing the button again. The Day flash Mode with 15 - lumen output is great for daytime rides to make sure you're seen. When it comes to charging, use a USB - C cable. The waterproof cover on the charging port protects it from dirt, but still make sure to keep it clean. As for maintenance, since it has IPX7 water resistance, it can handle a bit of rain. But if it gets really dirty, you can gently wipe it with a damp cloth. Don't submerge it for too long, though, even though it's water - resistant. And always store it in a dry place when not in use.