Vox Ap2Ac Amplug 2 Ac30 Guitar/Bass Headphone Amplifier.

Headphone guitar amplifier with 3 amp modes, 9 selectable effects, tremolo circuit, speaker cabinet emulation, and aux in jack.

• Power supply: AAA batteries x 2 (Best with Polaroid AAA batteries)
• Connections: headphone out, aux in
• Dimensions: W x D x H) 3.39 x 3.15 x 1.22" 86 x 80 x 31mm)