32V voltage swing, the highest voltage swing among portable Amplifiers. Up to 2500mW output power. Takes Balanced and Single End inputs, and provides Balanced and Single End outputs. 3-Setting gain jumper for impedance matching. 10 DIP sockets for OPAMP and Buffer rolling. 4-layer gold plated PCB. Rechargeable battery pack. More than 20 hours play time with stock OPAMPs. Measures 55*24*100mm, and weighs 167g.ALPS quad potentiometer, Hirose connector, Switchcraft jack, and Vishay high grade capacitors inside.