The ScanBrite™ UV scanning light serves many applications in home and business
    printing when used with VersaInk™ Invisible Florescent UV ink technology. After your
    document is printed with invisible VersaInk™ UV, simply turn on the ScanBrite™ and
    scan it over your document to activate UV ink, making the images or text visible. This
    way you easily verify important data only you know is there! The ScanBrite™ requires
    four (4) AA batteries (not included).