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Make sure your projector box included all of these parts:
1 Projector
2 Remote control
3 Remote control batteries (2 AA alkaline)
4 Interactive pens and replacement pen tips (4 soft tips, 2 hard tips)
5 Pen tray
6 Ultra-short throw wall mount (ELPMB53)
7 Power cord
8 16.4 ft (5 m) USB cable
9 USB extension cable (for saving)