TR-2

Tremolo

Provides guitarists with high-quality vintage tremolo effects in an easy-to-use compact pedal
Dedicated "Wave," "Rate" and "Depth" knobs allow for precise effect tailoring
"Rate" control allows for higher speed adjustment than classic PN-2
"Wave" control alters LFO waveform from triangle to square
"Depth" control determines the strength of the effect
BOSS five-year warranty

https://www.boss.info/us/products/tr-2/