Using your Lezyne Femto USB Drive Front Light is a breeze. First, use the versatile mounting strap to attach it to your bike's handlebar. It fits various handlebar sizes, so you can quickly get it set up. To turn the light on, just press the power button and cycle through the five output modes to find the one that suits your needs. When it's time to recharge, simply use the included Micro USB cable. Plug it into the USB port, which is protected by a secure Composite Matrix cover. It takes about 2.5 hours to fully recharge. As for runtime, you can enjoy up to 20 hours of use on a single charge. Remember, this light has an IPX7 water - resistance rating, so it can handle wet weather, but try not to submerge it for extended periods. Also, keep in mind that this light is not available in the German market. To keep your light in top condition, clean it regularly with a soft, dry cloth. Avoid using harsh chemicals that could damage the light's components.