The Boss FZ-5 is a modern pedal built for the modern guitarist, but the sounds you can get from the Boss FZ-5 are pure retro. Looking back at the glorious rock sounds of the 60s and 70s, the FZ-5 recreates its vintage fuzz through BOSS state-of-the-art COSM ® technology. Recall the fuzz-filled flavors of classic pedals such as the Maestro FZ-1A, Fuzz Face, and Octavia pedals, and kick ’em into overdrive with the FZ-5s Boost knob. BOSS proprietary COSM technology allows guitar players to recreate classic fuzz BOOST control for more aggressive tone. The FZ-5 is the perfect weapon for players wanting to beef up their rigs with classic retro fuzz artillery.