Using the Lezyne Strip Drive Rear Light is simple. First, use the versatile mounting system to attach it to your aero or round seat post. Then, turn it on and choose from 11 output modes according to your needs. For longer rides, select a mode with a longer runtime. When the light runs out of power, use the included micro-USB cable to recharge it. It only takes about 2 hours to fully charge. As for maintenance, keep the light clean and dry. Avoid exposing it to extreme temperatures or harsh weather conditions. If there's any problem with the light, contact the manufacturer for assistance.