Using this helmet light is easy. First, decide how you want to attach it. You can directly mount it on compatible Lazer helmets or use the Velcro strap through the rear vent for other helmets. Once attached, turn it on to enjoy increased safety and visibility. When it's time to charge, use the magnetic charging cable. It's designed to prevent water and dirt from affecting the charging process. Make sure to keep the light clean by wiping it gently with a dry cloth. Avoid exposing it to extreme temperatures. If you notice the light getting dimmer, it's time to recharge the battery. It takes about 2 hours and 30 minutes to fully charge. Enjoy your rides with this reliable helmet light.