[DISCONTINUED] VOX APNT Amplug Night Train Headphone Amplifier Practice in private with top-notch amplifier tone for complete sonic satisfaction Battery power provides complete tone-to-go mobility wherever life takes you Stereo 1/8 inch input allows jamming along to your favorite MP3, CD or iPod tunes Experience VOX high-gain tone; with Night Train's Thick/Bright switch Grab more than one and fortify your audition arsenal