Avotek is pleased to partner with CES, a Division of Azimuth Aerospace, to offer these electronics/avionics trainers. All CES trainers have the same dimensions (23.5″W × 14.5″H × 10″D); power requirements (110 to 120 volt AC, 60 Hz); and a manual with theory discussions, experiments, instructions, and an assessment you can use use to gauge student understanding.