Using the NiteRider Lumina Micro 650 & Vmax+ 150 Combo Light Set is easy. For the Lumina Micro 650 front light, simply press the power button to turn it on and cycle through the 5 different modes. If you don't want it to accidentally turn on, hold the power button for 8 - 10 seconds to activate the lock mode. The light is USB rechargeable, and keep an eye on the power button. When it turns from blue to red, it's time to recharge as there's about 15 - 20% battery life left. For the Vmax+ 150 taillight, press its power button to turn it on and choose from 6 different modes. It's super lightweight and can be easily clipped onto straps or belt loops. As for maintenance, since both lights are water and dust - resistant (IP64 rated), you can clean them with a damp cloth. Just avoid using harsh chemicals. Also, store them in a cool, dry place when not in use to keep them in good condition.