Bluetooth: wirelessly stream audio or content from a smartphone, tablet, or computer. Kid friendly: volume reduced to ensure safe listening levels for kids. Built-in microphone: for talking to friends & family. Battery & cable: Built-in rechargeable battery allows up to 18 hours of continuous playtime. Bonus detachable 3. 5mm audio cable connects to any device with a headphone jack. Quality: adjustable headband and padded ear cushions for maximum comfort. Foldable design ideal for convenient travel and storage.