4 channel stereo source selector module - reviews - There are 2 reviews.

Decent input switching device
The device itself is a very solidly built unit.
Giving only 4 stars because the following:
- the colored cable which connects the rotary switcher to the board has the tendency to break pretty easily. Some heat-shrink tubing would be nice over the connection points.
- for the voltage regulator maybe use an LDO type (eg. KA78R05) or similar for better efficiency (less heat generated)

Marche aussi en DC
J'ai acheté le même ailleurs et il marche aussi en DC. Le 12V semble un bon compromis. Dommage qu'il y ai des tic tics d'impulsion qd il n'y a pas de son aux entrées. A part ça, il faut avouer que c'est bien pratique ... Très bon son.