Arcade game video image produces the scan line effect,classic,nostalgia,Perfect recall of CRT.15KHZ video image display effect,Re-experience arcade game classic picture,Feel again the wonderful image of the scan line. VSYNC---Image resolution adapter switch(Change the resolution requirement). ON/OFF---The total switch of the scan line effect. WIDTH---Width switch(Dual or Singular scan lines). EVEN/ODD---Scan line odd or even number switch . R G B---Red Green Blue debugging(Mainly through three potentiometer debugging effect). Description of vertical signals: 1.If the scan line switch is ON,The scan line has no effect(image darker),This is vertical signal is out of sync. 2.If you need scan line effect,Toggle (VSYNC) to switch sync, resulting in effect. 3.If you don't need the scan line effect,switch is set to OFF,Image restoration to normal VGA state.(Darken image will restore brightness). Colour:black Material:plastic Package Contents: 1 x VGA Scan line Generator Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.