Take your tunes anywhere, with the portable and powerful AV LINK BOPP : PORTABLE BLUETOOTH SPEAKER. Equipped with Bluetooth technology, this stylish, compact speaker offers audio clarity and extensive device compatibility. An inbuilt TF/Micro SD slot adds to its versatility, enabling direct playback of MP3 and WMA files. Up to 4 hours of operation (at maximum volume) is available from the internal battery, which conveniently recharges via the USB cable supplied.