[6] This acquisition expanded KYE's dealer network and allowed them to absorb Mouse Systems' patents on optical mice technology.

[3]: 290 KYE continued to expand their international presence in the 1990s, establishing marketing subsidiaries in the United Kingdom in 1991, in Germany in 1993, and in Hong Kong in 1995.

[10] An April 2010 report by the National Labor Committee wrote of sweatshop-like conditions at the Dongguan factory, which had been recruiting 16- to 18-year-old women for summer jobs.

The NLC report wrote that the factory was crowded, with nearly 1,000 sharing a roughly 11,025 square foot room, and that workers were prohibited from conversing, listening to music, or using the bathroom outside of breaks.

[10] KYE Systems responded that they set their wages commensurate with Chinese labor regulations and called the report "a one-sided story without offering us a chance to explain".

[11] Chinese government officials on April 19, 2010, cited KYE with failing to register nearly 326 workers between the ages of 16 and 18 and imposing excessive amounts of overtime—280 collective hours a week, over the allotted 196.