Newest Design--Sports watches modeling & capacitive touch screen. Stylish dial design with only 0.43 inch thickness. • 16GB large internal capacity, listen to all your favorite songs in a time! • Lossless Sound quality& Various formats supported: mp3/wma/wav/flac/ape etc. • The longest playback time is up to 15 hours after 2.5 hours fully charged! BT playing time: 3.5 hours. • Bluetooth function: The watch player is compatible with Bluetooth 4.1 output device or lower version, such as Bluetooth speaker and Bluetooth headphone.Please note that Playlist is not supported at Bluetooth status. While using Bluetooth, other applications may not available.