JBL Safe Sound - legendary sound designed to never exceed 85dB for safe listening levels. Stream music via Bluetooth up to 15 M away. Up to 30 hour battery life on a single charge. Child-friendly control buttons make it easy to operate. Soft padded headband and ear cushions. Personalize headphones with included sticker set. Foldable design for easy travel. Frequency response: 20Hz-20kHz. Includes USB charging cable and sticker set.