Take your music wherever you go with the help of Sony C400 Wireless Behind-the-Neck In-Ear Headphones. The U-shaped headphone neckband lets you manage your bud cables and store them neatly when not in use, and the the long-lasting rechargeable battery gives you all-day sound for wherever your next adventure takes you. 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.