The Used Electro-Harmonix EHX XO Hum Debugger Hum Eliminator Guitar Effects Pedal is a high-quality noise gate pedal designed to eliminate unwanted noise and feedback from your guitar signal. Made by the renowned brand Electro-Harmonix in the United States, this analog effects pedal is suitable for a wide range of guitar types including acoustic, electric, and bass guitars. The XO Hum Debugger is specifically designed to help musicians achieve a cleaner and more balanced sound, making it a valuable tool for any guitarist looking to improve their tone and eliminate distracting hums and interference.