The tc electronic FLASHBACK 2 X4, equipped with a variety of delay effects. - Model Name: FLASHBACK 2 X4 - Brand: tc electronic - Color: Blue - Function: Delay Effect - Switch Type: Footswitch - Control Knobs: Subdivide, Delay, Feedback, Level - Connectivity: DC In, Input, Output - Included Accessories: Power Adapter, Quick Start Guide This model features the MASH switch on three channels of version 2. The official FLASHBACK X4 manual can be downloaded for the Japanese manual. I couldn't find a Japanese manual for the FLASHBACK 2 X4, so I looked at the English version while translating it.