The LitezAll Ultralite® headlamp is the perfect solution for home projects, hobbies, and crafts. It's comfortable to wear and fits most head sizes. Easy to operate with just one button. WARNING * INGESTION HAZARD: This product contains a button cell or coin battery. * DEATH or serious injury can occur if ingested. * A swallowed button cell or coin battery can cause Internal Chemical Burns in as little as 2 hours. * KEEP new and used batteries OUT OF REACH OF CHILDREN. * Seek immediate medical attention if a battery is suspected to be swallowed or inserted inside any part of the body.