No matter where you are, navigating the busy streets or working in the office, BH71 can also secure a crystal-clear communication experience with the 4-Mic beamforming noise cancellation technology. You can easily adjust the ear hook to best fit your ear. Just pull out the hook and put it on, and you can wear it with all-day comfort. The whole headset only weight 18-gram, which makes your ear happy all-day.