Hear what you want, anytime, anywhere with the JVC HA-C300 Single-Ear Wireless Headset! It has convenient Multipoint compatibility for seamless switching between 2 Bluetooth devices without troublesome switching. Its high-performance battery provides up to 20 hours for talking and listening to music—plenty of power to get through your day. It is also compatible with call lines and devices that have HD Voice. HD Voice was developed by AT&T. It is a high-definition, wide-band audio technology that offers a superior standard for voice calling by extending the frequency range of audio signals to deliver better comprehension and clarity. This mono headset is also comfortable, thanks to its soft earpiece and reversible, removable earhook.