If you're out and about then power this compact portable CD player using 2 standard AA batteries. If you're at home you can purchase & use the DMP-395 mains power supply (not included) to save the expense of batteries. The DMP-395 boasts 40 second anti-shock for music CDs & 100 second anti-shock for audio books & MP3 CDs, meaning no interruptions in your audio enjoyment.