RadioShack Amplified Stereo Listener With 3-Band Equalizer Ideal for church, TV or anytime you want to hear sounds louder without disturbing others Includes stereo headphone jack, so you can add headphones to boost the sounds around you Features a 3-position equalizer control so you can choose the amplification you need Compatible with all stereo headphones with 1/8" plug Requires 2 AAA Batteries. Batteries sold separately.