ViewSonic VPD400 User Manual page 8

Enjoy Life, Enjoy ViewSonic
6. Navigation button (left), Escape, Rewind
7. Navigation button (right), Fast-forward
8. Navigation button (up), Previous
9. Navigation button (down), Next
10. Enter/Mode
11. DC socket (5V , 2A)
12. USB slave jack
13. Micro SD memory Card slot
14. Infrared receiver window
15. Power switch
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ViewSonic VPD400/VPD500