The Mooer Acoustikar Acoustic Guitar Simulator transforms your electric guitar into a beautifully simulated realistic acoustic sound. It features 3 modes: Piezo, Standard and Jumbo. The Piezo mode simulates the piezo pickup from an acoustic-electric guitar. Standard mode simulates a normal acoustic guitar. Jumbo mode gives you more low end and resonance by simuating a large bodied acoustic. Its full metal casing makes it durable and road ready and like most great effects pedals it has true bypass.