Stanton SK 2F Professional 2 Channel DJ Battle Mixer 1993 The FLIR ONE Pro helps Door Hinges The FLIR ONE Pro helps you find invisible problems faster than ever and an I O panel for aux tape inputs so that students could play along to prerecorded material Other modifications from the SK TWO include:Input Meter The SK 2F features anew bar graph LED meter The advantages of the focus fader 1: Extra long life (no contacts or graphite material to wear out because it is a true opticalfader) 2: Super sharp cutoff (nothing compares) 3: Virtually no fader resistance 4: No more static or crackly noise (no contacts to make that junknoise) 5: No bleeding