Sony WFXB700 Truly Wireless Headphones Just your music, with no wires to get in the way. EXTRA BASS The WF-XB700 feature EXTRA BASS for seriously powerful, punchy low-end sound. Your favorite music never sounded so good. Excellent Battery Life The WF-XB700 headphones are built to outlast even your longest playlists. Get up to 9 hours of battery life on a single charge, and the charging case supplies another full charge, delivering a total of up to 18 hours of battery life. If you’re low on power, 10 minutes of charge time gives you up to 60 minutes of playback. IPX4 Rating With an IPX4 rating, splashes and sweat won’t stop these headphones – so you can keep on moving to the music. Hands-Free Calling Conversation flows freely with easy hands-free calling, thanks to the built-in microphone. No need to even take your phone from your pocket. Ergonomic The WF-XB700 earbuds are ergonomically designed to contact three different points on your ear for a secure, comfortable fit. Additional Features A simple button press connects you to your smartphone’s voice assistant to get directions, play music, and communicate with contacts. A Bluetooth chip that transmits sound to the left and right ears simultaneously, coupled with an optimized antenna design, ensures a stable connection and outstanding listening. Low audio latency makes for enjoyable video viewing.