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Sony NW-WS623 Waterproof Bluetooth Headset Questions & Answers

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Hold down the button (1) for 3 seconds.

You will hear the shutdown sound. Then, the Walkman and the lamp ( 2 )  will turn off.

No. It does not have remote control.

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

Yes, it does have fast charging. Charge it for just 3 minutes and it will work for another 60 minutes.