This class sets the extended channel interpretation mode indicator for the ucs2 character set. While this is a Data object, it does not directly encode data. Instead, it sets a flag in the data stream which tells a decoder how to interpret the data that follows. Ucs2 is an interesting character set because JavaScript strings are handled in ucs2. Combined with the ByteData object and a character width set to 16, any JavaScript string can be precisely encoded. Unfortunately it appears that many decoders lack support for the ucs2 character set. Android's standard Barcode Scanner application does provide support, but the font used to display the result is not able to render the entire range of unicode characters.