Seife OP-AMP: 4558
Audio Input: Line
Channels: 2
colour:green
material:PCB
size:10.3x8cm

Package Contents:
2 *Amplifier board
2 *Knob

Only the above package content, other products are not included.
Note: Light reflection 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.