About this item Foldable, space-saving design that is easy to carry. Colorful gradient lights create a gorgeous ambiance. Built-in microphone reduces noise during calls; supports hands-free functionality. Soft, breathable earmuffs fit snugly without leaking sound. Bluetooth 5.0 ensures compatibility with all Bluetooth-enabled devices such as mobile phones and tablets, with an effective range of 10 meters. Call duration of 10 hours, music duration of 15 hours, and stand-by duration of 180 hours, with a full charge in just two hours. Connect devices in three ways: Bluetooth mode, cable mode, and TF card mode (headphones feature AUX plugs for wired connections; AUX audio cable included). Experience three-dimensional surround sound with impressive audio quality, featuring a large moving-circle speaker that effectively balances high, mid, and low frequencies for rich sound restoration. Size: 6.18 x 5.12 x 3.5 inches.