Optical okay technically a cheap product with many weaknesses. Even if you do not expect a lot of sound for a children's unit, the speakers in this unit manages even to undercut this expectation. What's worse is that the micro causes strong feedback in the ON state, associated with annoying noises. In order adequately to avoid spacing in order to create the sound, you have to take the risk that the cable between the device and micro-tearing. We will return the device that it does not meet the purpose.
