I am selling this item as it is no longer needed, though it was purchased new. Includes the AT-HA2 headphone amplifier with a maximum output of 300mW, a 1.0m connection cable, and an AC adapter. - Brand: audio-technica - Model: AT-HA2 - Included items: 1.0m connection cable, AC adapter - Output: Maximum output 300mW - Application: For headphones Thank you for looking.