Yes, you can connect it with phone and talk and can use as a normal Bluetooth headset.
You can check the charging status with the lamp ( 3 ).
While the battery is charging: orange when charging is complete: green
Hold down the button 1 for 3 seconds.
You will hear the startup sound.
When the Walkman turns on, the lamp (2) lights up.
Sony NS-WS623 is available only in the Black color.
No. Sony NS-WS623 does not have FM radio.