VGA Image Scan Line Generator Function: 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. Color: black. Material: ABS. Scan Line Generator Function Switch: VSYNC – Image resolution adapter switch (change the resolution requirement). ON/OFF – 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 adjustments for effect tuning). Description of vertical signals: 1. If the scan line switch is ON and the scan line has no effect (image appears darker), the vertical signal is out of sync. 2. To enable the scan line effect, toggle the VSYNC switch to synchronize the signal and produce the desired effect. 3. If the scan line effect is not needed, set the switch to OFF. The image will restore to normal VGA state (darkened image will return to normal brightness). Package Contents: 1 x VGA Image Scan Line Generator Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement may vary by +/- 1-3 cm.