No. Sony SBH56 does not have the FM radio.
Yes, Sony SBH56 does have the inbuilt speaker.
No. Sony SBH56 does not have the MicroSD memory card slot.
It takes about 2 hours to fully charge the Sony SBH56.
The Sony SBH56 is very good in voice quality, the sound quality from the in-ear earphones is clear and sharp, and the microphone quality is also good. The recording quality of the microphone is also quite good.
The Sony SBH-56 is a fantastic accessory to have if you have many wired in-ears and headphones. It certainly turns all of your devices 'wireless'. It is a fantastic choice for those who want to step in the wireless world without an overhaul of all their wired audio products.