Versatile portable headphone preamp that has two channels which can handle Stereo and Mono signals. Each channel has independent level control and two input jacks. User can use 4 headphones at the same time and with the LINK function, multiple units can be linked together. The unit also provides balanced and unbalanced outputs; AUX In and RCA In with Master Volume control; and LED Level Indicator Link jacks. Dimensions: 121 x 84 x 55 mm. Weight: 350 g.