Electro-Harmonix Dual Expression Pedal 

The Dual Expression Pedal’s dual-output design gives hands-free control of two devices from a single source. Each expression output has independent range and reverse plus a polarity switch for maximum compatibility with a wide range of gear. Two six foot TRS cables are included.

Specs:

Manufacturer: Dual Expression Pedal
Type: Expression
Power Source: 9V
True Bypass: no
Inputs: none
Outputs: Mono out
Extras: Two 1/4” TRS cables