Very simple single button design. The excellent Fzone FT-15 clip on chromatic tuner. Very simple to use with a single selector button for on/off and also mode selection. Suitable for any stringed instrument including banjo, guitar, ukulele, violin and others. It just simply clips on to the headstock of your instrument and picks up the vibration to register the exact tuning of your instrument. Please see more details below. Note Eastman guitar not included!