The Yealink BH71 Mono Bluetooth Wireless Business Headset provides a high-definition audio quality while you are commuting or in the office, whether connecting to your smartphone, desk phone or PC. With the 4-mic beamforming noise cancellation technology, you can always be heard clearly. The BH71 also provides an adjustable ear hook for comfortable wearing, which can easily be adjusted to best fit your ear. The Yealink BH71 can guarantee 10-hour talk time to secure all-day use.