[Open-ear Comfort] Unlike the traditional earphones, this Bluetooth headset with open-ear design don't go in your ears, which can cause less damage to hearing than other in/over-ear earbuds. G9 headset Bluetooth wireless ensures both all-day comfort for long-term wearing and situational awareness & connection with your colleagues. Not only suitable for office/home, but also fit for outdoor activities. Make you safe and never miss friends greeting on your run. [Detachable Ambient Noise-Canceling Boom Microphone] Wireless headset features an adjustable ambient noise cancellation boom microphone which can be rotated 360° to receive the voice exactly and filter the surrounding noise for clearer call quality. Besides the detachable mic is magnetically designed. With a removable boom mic, these open ear headset can easily transform from Bluetooth work headset into a fashionable wireless sport headphones. G9 headset Bluetooth with microphone has 15.4mm driver speaker which is bigger