The VOX AP2-CR is a classic rock-style headphone amplifier that delivers high-quality sound, made in Japan. - Brand: VOX - Model Name: AP2-CR - Style: Classic Rock - Made in: Japan - Power: Uses 1 AA battery - Connections: 1/4 inch jack Thank you for viewing. A few years ago, I accidentally stepped on it, and the plug part has become loose. The sound is also intermittent unless the plug is held in a certain position. It is a defective item, but it can be used if held in a certain position, so I am listing it. I think the built-in effects were working fine, but I haven't confirmed it, so it's uncertain. Please purchase only if you understand that this is a junk item. I haven't checked the operation with batteries since a few years ago. I will wrap it in bubble wrap and ship it via regular mail.