NMT-1 is a combined tester and tuner for guitar and bass players. Two pairs of connectors can be used for testing DC jack power leads and 6.3mm audio jack power leads. Connecting power through the unit means that you can check the voltage and current that is fed to your valuable guitar or bass pedals. The large colour display is also clearly visible for tuning on-the-fly with the inbuilt chromatic tuner. A unique and essential addition for a well-equipped pedal board.