Tru-Tron 3X

VC Envelope Filter, Auto-Wah

Due to trademark issues in the US released under the name Tru-Tron 3X only. Mu-Tron 3X is the European version. It's designed by legend Mike Beigel who used to run Musitronics, worked with Guild, Arp and Electro Harmonix (see Q-Tron).

https://mu-fx.com/store/pedals/trutron-3x/