Bluetooth Mini Blue Series Stereo Power Amplifier, 2 x 40W

As is seemingly customary for Pyle (my FOURTH Pyle product with the same "flaw") their so-called User Manual and website leave me hoping I'll either be an 8-year-old, born into the Thumb Culture; or will stumble over the features through pure luck. FULL DISCLOSURE: 1) I was "born before the turn-of-the-century"; AND 2) one of my jobs at that time was as a Technical Writer -- writing not only Quick Start Guides/User Manuals, but also Operational Guides for the "repair guys/maintainers". The product itself is very good. Lots of bells-and-whistles, and is compact, too. Having spent time in the Broadcast industry, I am impressed with the quality of sound the unit produces for the price! The casing is metal, rather than plastic. It takes a variety of input sources, even has a slow charge USB port on the front panel (so your smartphone's charge can easily be maintained, as you play your music). I would give it FIVE STARS for quality -- if I could easily discover what those qualities are. I have to erase TWO of those stars for those things external to the product, but essential. It comes with a remote control, even... but there is not a single illustration or direction on how to employ it; in the four pages of the User Manual. IN SUMMARY: This is a great "bookshelf" amp. Good luck stumbling over how to get it to perform to potential.