Suggested Retail:$127.99. Sony WF-XB700 EXTRA BASS True Wireless Earbuds Headset/Headphones with Mic for Phone Call Bluetooth Technology, Black. Enjoy deep punchy EXTRA BASS sound in a truly wireless headphone The WF-XB700 truly wireless headphones keep you going with up to 18 hours of battery life plus quick charging 1 The Ergonomic Tri-hold structure provides a secure fit and the IPX4 design gives you long-lasting sound through rain and sweat.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.