The TU-12H High Range Chromatic Tuner from Boss is ideal for tuning a wide range of string, wind, brass or ethnic instruments. The TU-12H uses an easily visible tuning system with LED indicators and a large needle for precise tuning. Plug your instrument with the 1/4″ input jack or use the internal condenser microphone for tuning your acoustic instruments. With its adjustable standard pitch settings from 440-445Hz, this reliable tuner can be used in a variety of musical settings