Denver TSP-300, the trolley speaker with a built-in battery, offers diverse music playback options and recording functionality. Equipped with an 8" and 3" speaker, it delivers quality sound. Connect via Bluetooth, AUX, USB, or TF (Micro SD) card to enjoy your favorite music. Tune into FM radio stations for a wider range of entertainment. The LED display provides clear information about the current mode and functions. Record and playback your own audio using the dedicated buttons. Adjust the volume, treble, echo, mic volume, and bass to your preference for an immersive audio experience.