Using the Lezyne KTV Drive Front light is a breeze. First, make sure it's fully charged. You can do this easily by plugging the integrated USB stick into a power source. Once charged, attach the light to your bike. You can switch between the five output modes according to your needs. For daytime riding, the Daytime Flash mode is great as it makes you more visible. For longer rides, choose a lower output mode to conserve battery. When it comes to maintenance, keep the light dry as it's waterproof but still don't submerge it for too long. Wipe it clean regularly with a soft cloth. Remember, this light is not for sale in the German market, so make sure you're in an eligible area when purchasing.