The Sandberg Pocket Bluetooth Speaker Pro connects wirelessly to a Bluetooth device such as a mobile phone or tablet computer. Despite its incredibly small size, the speaker delivers an impressive audio performance. The built-in battery gives 6 hours of playback so you are all set for a day on the beach, for example. Thanks to functions like next/previous track, play/pause, etc. the speaker also acts as a remote control for your device. Allows you to make hands-free and wireless calls.