With the Teenage Engineering OB-4 Black, you get a Bluetooth speaker with various functions you can easily take with you. In addition to your online playlists, you can also listen to the radio and music via the line in connector. This allows you to listen to the news and connect an audio mixer, for example. Thanks to the 4 speakers, you hear a clear and room-filling sound. The bass channel provides a deep bass. The battery lasts 72 hours if you only listen to the radio. If you listen to music via your smartphone, the battery lasts 40 hours. This way, you can effortlessly listen to music for days. Thanks to the compact size and adjustable handle, you can easily take the speaker with you. You can also use the handle as a stand and put the speaker down.