Hold down the button (1) for 3 seconds.
You will hear the shutdown sound. Then, the Walkman and the lamp ( 2 ) will turn off.
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.
You can check the charging status with the lamp ( 3 ).
While the battery is charging: orange when charging is complete: green
Yes, you can connect it with phone and talk and can use as a normal Bluetooth headset.
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 ).