Use the included power supply when near a wall outlet, or pop in four AA batteries when you"re on the go. Perfect for picnics or other gatherings, the CA-461 also includes a convenient carrying pouch for transit,The CA-461 is designed to deliver plenty of sound, despite its compact size. Two-inch full-range speakers offer 6 watts of room-filling stereo sound. The "Xtreme Bass" feature ensures the low-end is not left behind.