Peterson StroboRack Virtual Strobe 19" Rack Tuner - 19"/1U, 0.1% accuracy, large, backlit Virtual Strobe display. 24 Peterson Sweetened tunings for electric guitar, acoustic guitar, bass, dobro, baritone, steel guitar, electric violin, Buzz Feiten Tuning System with open string and intonation settings, 8x user-programmable sweeteners, 25x user presets, integrated mic, mute button & remote (jack), signal out (jack), all metal construction, Neutrik sockets, 12V BNC gooseneck light output, integrated power supply, pro-module optional.