Features include: in and out RCA-type jacks for electronic instruments or pickups; a large, easy-to-read LCD meter and LED lights which indicate at a glance if the pitch being played is high, low, or in proper tuning; automatic or manual note selection; pitch calibration from 436-445 Hz; a four-point built-in microphone for unsurpassed accuracy; superior performance for all instruments and a coin slot on back of tuner for tilt back stand.