Working with Guitar Bass Keyboard Synthesizer Workstation Controller etc

Buy at www.musicianscart.com SONICAKE QEP-02 Vexpress Passive Volume Expression Guitar Effects Pedal,Passive Volume Control/Expression Control 2 functions in 1 Pedal,Automatically Detect the Functionality (Volume or EXP Control),Working with Guitar Bass Keyboard Synthesizer Workstation Controller etc,Working without Battery or Pedal Power Supply,Lightweight & Compact Design for easy Taking it Anywhere.