evaluation machine 1. have 3 key-press 2 .in a good quality 3 .competitive price compare with other supplier Evaluation of controller placed ... can to evaluate personnel service quality typeGHC02Light LCD lightPanel DescriptionComprehensive evaluation, four function keys, employee cardInterfaceRS232, PS/2, TTL ... in general, satisfied3, the automatic voice prompts; Hot selling ! GHC Evaluation Machine