Thank you for viewing. ◎ This is a junk item. ◎ The exterior is in beautiful condition. ◇ Product Name: Headphone Amplifier amplug ◇ Model Number: AP-AC AC30 ◇ Junk Condition: Power does not turn on / No display sticker inside the battery compartment ◇ Specifications: GAIN / TONE / VOLUME ◇ Size: 86 x 80 x 31mm ◇ Weight: 40g ◇ Batteries: AAA x 2 ※ Returns are not accepted, so please understand. Please check the photos and understand before purchasing.