&162; 8-step attenuation level control (+/- 3d B)\n&162; Ergonomic control knob with better grip for easy turn\n&162; 24VDC overriding relay with red LED indicator\n&162; Terminal block for thicker diameter cable\n&162; Clip-on face plate\n&162; 2 / 3 / 4 wire system\n&162; Surface or Flush mount\n&162; Glossy Flnish in white