DreamGEAR GoSonic is a portable speaker with a built-in battery that allows you to enjoy your music without the need for alkaline batteries. It has a compact size and comes with a travel bag for easy portability. The GoSonic can be connected to your audio devices using the included 3.5mm audio cable, making it compatible with a wide range of devices. It features a simple on/off switch and a volume control knob for adjusting the audio level to your preference.