Manufacturer Description:

two-channel headphone amplifier
 
    two audio inputs with level controls
 
    Input 1 is normalled to Input 2
 
    common loudness/master level control
 
    headphone output (stereo 1/4" jack socket)
 
    max. output power ~ 2 W per channel (@ 8 Ohm load)
 

DC coupled inputs and outputs (i.e. also useful for other applications like small loudspeakers, lamps, LEDs, magnets, motors - provided that the power is sufficient)