Peterson tuner

Professional tuner by Peterson the autostrobe stretch 490- st tuner this can be used for pianos or accordions. It’s an expensive piece of kit used by the professional accordion manufacturing company’s. In castlefidardo. It has an internal Mike built in But you can also put an external. tuner has never been used in any form the manual can be downloaded in pdf form 750€ if interested no offers. This tuner is still being made And lives in Galway. Thanks for looking