Sony WI-C400/B WI-C400 Wireless In-ear Headphones

•NFC One-touch for instant connectivity Near Field Communication (NFC) and BLUETOOTH® technology remove the need for wired connections and complex set-up sequences. Simply touch your NFC-enabled device to the headphones for a quick,seamless connection, then start streaming your music collection. No NFC? No problem. Connect via Bluetooth® and you're ready to go. •Long listening time with up to 20 hours' battery life When fully charged you can enjoy up to 20 hours of music playtime or talk time. •Four color variations Headphones are available in black, red, blue, or white. •Neckband for all-day listening Shaped for comfort, the lightweight neckband allows you to wear your headphones all day, keeping the earbud in place. •Cable management The cable can be stored tangle-free and neatly held in place with the cable adjuster and stopper. •Vibrating neckband for calls Your neckband will vibrate to let you know you received a call, so you won't miss a thing. •Easy operation with buttons Use the buttons to play, stop, or skip through tracks and adjust the volume. You can also push them to activate your smartphone's voice assistant features or make hands-free calls.