Rolls MO2020 Test Tone Oscillator mandolin It features multiple bolt holes

It features multiple bolt holes for diverse Column pole configurations

you get two Quantum humbuckers and one Quantum single-coil pickup complete with five-way switching

LTD Tuners

It works with most any mic stand and helps hold the mic securely while you play your instrument or give an energetic

Rolls MO2020 Test Tone Oscillator mandolin It features multiple bolt holesThe MO2020 provides a sine and square wave output on two 1 4" jacks. The frequency range is variable from 20Hz to 24kHz, it accepts a 1. 2 to 5 volt dc input on a 1 4" jack for external frequency control, and a 10 dB Output Pad is included to provide a 10 dB reference signal.