Sony WS623 comes with LED indicator. If it is not fully charged and require charging - it will show orange light and when it is fully charged - it will show green light.
Sony NS-WS623 is available only in the Black color.
Yes, it does have fast charging. Charge it for just 3 minutes and it will work for another 60 minutes.
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 ).
No. It does not have.