The handheld device connects wirelessly to the organ's computer relay to allow one-handed control of the pipework. Features include turning on and off pipes of different ranks, turning on and off octaves above and below the pipe being tuned. The wireless feature means that there are no long wires teathering the tuner to the organ relay. Long wires inevitably get caught in the pipes and can cause damage in the pipe chamber.
The other main advantage is that one person can tune and not need a second person to sit at the organ console.