The MicroAMP4/2 has two inputs that can be selected for the outputs by connecting. Ideal for, for example, information kiosks where you want to be able to choose between two different languages. Stereo headphone amplifier with 4 outputs. RCA inputs for the two channels. Outputs for headphones, 3.5mm stereo connectors with separate volume controls. Dimensions H43xW143xD75mm with connectors. 3 can be mounted in a 19" 1U rack kit. 12VDC PSU included.