This keyboard quick-button array was made especially for US Army CPT Luis Avila who was severely injured by an IED. Luis lost his left leg but sustained sever head injuries resulting to mobility loss on his right and very limited use of his left arm. Luis is very active using his adapted PC but needed a small "hotkey" button set to allow him better access while using the PC in his wheelchair. This 4-button setup is plugged into his PC and is mapped to 4 common functions. The setup slips onto his wheelchair driving control when he is in front of the PC. It has been very useful to him and his healing process.Several of these were made for him.