Panasonic SLS231C is a portable CD player that uses compact discs and is powered by either AC adaptor, rechargeable batteries, or dry-cell batteries. You can use it to listen to music on the go, whether you're at home, in the car, or outdoors. The device has a number of features that make it easy to use, including a backlit display, skip/search buttons, and a repeat function. It also has a HOLD function that prevents the unit from being turned on or off accidentally.