Using the Nathan Strobe Light is a breeze. First, find a good spot on your clothes, shoes, or hat to clip it on. Then, click the on/off switch to turn it on. You can switch between strobe and constant lighting modes just by clicking the switch. When you're done using it, click the switch again to turn it off. As for maintenance, since it's IPX4 weather - resistant, it can handle a bit of rain, but don't submerge it in water. If it gets dirty, use a soft, dry cloth to wipe it clean. Keep it in a dry place when not in use to make it last longer.