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Sony NW-WS623 Waterproof Bluetooth Headset Questions & Answers

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Yes, Sony NS-WS623 does have NFC connectivity option.

You can check the charging status with the lamp ( 3 ).

While the battery is charging: orange when charging is complete: green

Sony WS623 has 4GB internal memory and you can further expand it up to 16GB with the help of MicroSD card.