The shipping was quite slowly. I haven't tested the product in detail yet. I tested it just to see if it works in general. I can say at first sight that: -The Bluetooth connection was made successfully. -I checked each channel separately and it works in Aux mode. -The volume potentiometer has problems, there are two areas where noise appears when rotated. It may be of poor quality or it has a little dust or dirt (I hope I can solve the problem somehow). That's why I cut a star. So far just that. I hope I have no more unpleasant surprises at the next more detailed test.
inferior product, sell the model zk-1002 and deliver the zz-1002. It does not work properly, left side does not transmit sound.