Two days after receipt of the goods is the filled with the automatically generated rating prompt the mailbox. This then comes twice a day and harassed a before one has tested the part. The is a reason why he does not specify cable length as short as it is. A mini amplifier and speakers is powered via the USB ports with power to connect is not possible because the USB output voltage is very poorly smoothed and obviously generates very large harmonics. I have taken the trouble and screwed the part, what a miracle it is not bonded, which would obviously be more expensive in production. The electronics I've discovered it might in any case be the cheapest from Biligsten. PURPOSE!