JBL Safe Sound <85dB for safe volume for kids. Parental Control with Customizable Volume & Playtime. JBL Headphones app for real-time reports on usage and volume. PIN code protects settings. Built-in mic helps kids stay connected with the world. 50 Hour battery life. 12mm Thick soft pad on the adjustable headband. Fold flat to stow in backpack. Child-friendly control buttons. Plastic-free packaging folds into a fun device stand. Driver: 32mm/1.26" Dynamic driver. Includes: JUNIOR 320BT Headphones. USB Type-C charging case. Sticker sheet.