Yes, Sony NS-WS623 does have NFC connectivity option.
Sony NS-WS623 is available only in the Black color.
Sony NS-WS623 is quite light weight. It weighs just about 32 grams.
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 ).
You can check the charging status with the lamp ( 3 ).
While the battery is charging: orange when charging is complete: green