EMB Audio - Slash onstage in the early 90s during soundcheck. You can see his modified ernie ball volume pedal which is actually the control pedal for his emb audio remote wah.
Amazon.com: Dunlop SW95 Slash Wah with ECB004 18-volt Power Supply and 2 6-inch Patch Cables : Musical Instruments
Dunlop SW95 Slash Cry Baby Wah Pedal | Guitar Center
Cry Baby Slash Wah - SW95 - Cottonwood Music Emporium
Dunlop SW95 Slash Cry Baby Wah Pedal | Music & Arts
SW95 Slash Signature Cry Baby - YouTube
SLASH CRY BABY® WAH - Dunlop
SC95 Slash Cry Baby Classic - Dunlop - Max Guitar – Max Guitar