NUX Roctary force guitar effects pedal Rotary Speaker Simulator and cabinet polyphonic Octave effect 2 in 1 Roctory is a word mixed with Rotary speaker simulator and polyphonic Octave effects With NUX original TSAC Technology, it faithfully recreates the lush swirling sound of the rotating lower speaker and the treble rotor horn in 3 Dimensions. It even captures the characters of the over-driven tube amp to the speaker! TSAC Technology Rotary Speaker Effects Slow/Fast Switch with Adjustable Rising Time Built-in Overdrive Accurate Polyphonic Octave Effects: +1 Octave and a -1 Octave FET