Stereo Tap Tempo Tremolo
The PING-PONG pedal is a Stereo Tap Tempo Tremolo unit featuring a 100% analog signal path, and a control circuit utilizing a microcontroller.
This design scheme allow the artist to develop numerous interesting and unique settings and tones.
First, use the "Waveform" knob to dial in your choice of five different types of modulation waves, then use the tap tempo function to sync the pedal effect with the tempo of the music.
Finally, use the "Multiplier" multi-position switch to customize the effect.
Using multiplier allows you to get much faster speeds than it's possible to tap, while still allowing tap tempo control. As you can see in the video, it's super easy to dial up an infinite number of interesting sounds.
From the unique to the truly bizarre, it's all here in the PING-PONG...........in Stereooooooo.
Stereo and Mono capability.
Volume – signal output level
Depth – modulation depth
Speed – modulation speed 
Multiplier - (rotary switch) selects the tremolo time division
Waveform - (rotary switch) selects one of these five waveforms:
Up ramp
Down ramp
Features: 100% True Bypass
Power:  9 volt, negative center pin power supply.
Do not use the One Spot, or any other switching power supply!
Length: 115 mm
Width: 90 mm
Height: 50 mm
Weight: 430 grams

This pedal is custom-made.

Terms of manufacturing and the price is discussed individually.