In the updated version, this module is only a part of the reverberation circuit, and a number of peripheral circuits are needed. There is no microphone amplifier and hybrid circuit. The user needs to be proficient in circuit analysis capabilities._x000D_ The working voltage is DC 5V._x000D_ There are 100 effects from 0-99. Rotate to select the number, and then press to confirm._x000D_ Now put the reverb volume sound potentiometer on the board. Material:Electronic component_x000D_ colour: Random Color ('t accept the specified color.)_x000D_ Different batches of modules have different layouts, which will not affect the use Package Contents:_x000D_ 1 x DSP Digital Reverb Module Only the above package content, other products are not included._x000D_ Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_