Used AUDIOTRAK imAmp headphone amplifier. Power-on has been confirmed. Battery condition is unconfirmed, but considering the manufacturing date, it's likely degraded and will need to be used with the power adapter. Please check the photos for the current condition and what's included. I will try to ship as quickly as possible, but shipping will generally be on either Saturday or Sunday. Thank you for your understanding. - Brand: AUDIOTRAK - Model Name: imAmp - Power: DC 12V-15V - Included: AC adapter, cable