Sony Walkman NW-WS623 4GB Wireless MP3 Player with Bluetooth and NFC (Black) NW-WS623, the new waterproof and dustproof Walkman. Let’s you focus on the exercise you love, whether that’s in water or on land. Now with Bluetooth and NFC, wireless technology, you can stay connected with your trainer or buddies while being engaged in your exercise session with your favourite music. This tough all in-one wireless Walkman can handle temperature ranging from -5C to 45C and also dust, thanks to IP68 ratings you can fancy a refreshing swim on a hot day with NW-WS623 as it can be submerged up-to 2 meters underwater for 30 minutes whether it’s in the pool or in the sea. With ambient sound mode, train for hours being connected with outside world while listening to your music - meaning you can listen out for cars on endurance cycling sessions without removing your device with quick charge function, just charge your Walkman for 3 minutes and enjoy 60 minutes of music listening. Once fully charged, you can enjoy 12 hours of your favourite music on the go.