The black HD 1 In-Ear Wireless Neckband Headphones from Sennheiser feature a combination of ergonomic design, good sound performance, and take-anywhere mobility in a Bluetooth 4.1, Qualcomm aptX headphone. With NFC for simple one-touch pairing, an integrated microphone, and a ten-hour battery, the headphones can be used to listen to music and take phone calls with mobile devices such as smartphones, tablets, and MP3 players.