 The Hohner Electravox is an electronic accordion which has one channel (combined left hand and right hand) or two channel (separate left hand and right hand channels, which enables independent volume changes), 92 bass/chord buttons, keyboard percussion effect for the bass buttons and keyboard, a vibrato effect (with slow/fast options), and a separate power supply unit, which sits on the floor.The Electravox had 16', 8', 5 1/3', and 4' registers.The tuning for the Electravox could be changed to match another instrument, such as a piano or organ, but this required changing all 12 master tone generators with a special tool.