No. Sony NS-WS623 does not have FM radio.
Connect the USB cable (supplied) to the USB cradle (supplied). Then, attach the Walkman to the USB cradle.
Make sure to connect the terminals ( 1 and 2 ).
Sony WS623 has 4GB internal memory and you can further expand it up to 16GB with the help of MicroSD card.
No. Sony WS623 comes with non-removable battery.
No. It does not have remote control.