Other institutions, notably the University of Hull in England, have also developed similar devices. However, the palatometer is the only such invention that operates without any kind of surgical implant. The downside of the South African device, however, is a 0.3-second delay between when the tongue and mouth move, and when the computer calculates the right word. This leaves the mouth and the voice out of sync, giving the user the appearance of being dubbed over in a bad kung-fu movie.