The Boss FV-50H is a high-impedance volume pedal designed for use with electric guitars, basses, and other high-impedance instruments. It features a Tuner Out jack, which allows you to route a signal to a tuner while keeping the main output signal intact. This pedal is built with durability in mind, offering smooth volume control for both live performances and studio settings. The high-impedance design ensures a clean, strong signal without tonal loss, and it's compact, making it suitable for pedalboards. Ideal for musicians who need precise volume control along with the convenience of a tuner output.