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Shop Sony Walkman NWWS623 4GB* InEar MP3 Player Black at Best Buy Find low everyday prices and buy online for delivery or instore pickup Price Match GuaranteeDigital Music Player NWWS623/WS625 Printable PDF;Sony Support NWWS623 Specifications Product Highlights Size & Weight Weight Approx 32 g (12 oz) Power Charging Time (Quick Charge) 3 min Charge, 60 min Playback Charging Time (full charge) 15 Hours Power Battery Life Continuous Playback Music Sony Nw Ws623 Mp3 Player Waterproof And Dustproof Walkman With Bluetooth Wireless Technology 4gb Nw-ws623 review