The FCC website has 2 items listed as Manual, but both are just a 2-pages piece of paper... Not sure if that's what was included with the packaging. I think the printed "manuals" for Sony dev hardware are usually small, and then you have a bigger manual in PDF form with the SDK (especially starting with PSP/PS3) https://fccid.io/AK8DECR1400A
This link is for reference only, no instructions manual were found. Official instructions manual. Where can I download?