About this item Foldable, space-saving design that is easy to carry. Colorful gradient lights provide a stunning visual experience. Built-in microphone effectively reduces background noise during calls for hands-free communication. Soft, breathable earmuffs fit snugly to prevent sound leakage. Bluetooth 5.0 allows connection to 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 two hours. Three ways to connect devices: Bluetooth mode, cable mode, and TF card mode (headphones include AUX plugs for wired connections, and an AUX audio cable is provided). Experience three-dimensional surround sound that delivers impressive audio quality with large moving circle speakers, balancing high, mid, and low frequencies for optimal sound layer restoration. Product dimensions: 6.1 x 5.08 x 3.31 inches.