I've used it twice, but it didn't suit my needs, so I'm selling it. It was about 10,000 yen on Amazon. It's almost new. ~Quoted from the product link below~ 【Patented & Industry-First Innovative Design】Earaku MicCuff A2 is the industry's first Bluetooth headset with a patented detachable microphone design and open-ear design. It revolutionizes usability in business and daily life, achieving comfort and functionality that sets it apart from conventional earphones. It's also ideal for online meetings and driving, with a cutting-edge design that meets the needs of business elites. 【ENC Noise Cancellation & One-Touch Mute Function】Equipped with ENC (Environmental Noise Cancellation) noise cancellation technology, it effectively cuts out ambient noise. It achieves clear call quality. Furthermore, it is equipped with a one-touch mute function that is easy to operate. Even during meetings or important calls, you can quickly cut off the audio, balancing privacy and convenience. 【Bluetooth 5.4 EDR & Omnidirectional Microphone】Equipped with the latest Bluetooth 5.4 EDR, it achieves a fast and stable connection. It has a long communication distance and is designed to be less prone to interruptions, making it ideal for use in business or while driving. Furthermore, it adopts an omnidirectional microphone, which clearly captures audio from any direction. It further improves call quality and supports professional communication. 【Detachable Microphone & Single/Dual Ear Switching】With a detachable microphone design, you can flexibly switch between call and music use. Furthermore, it allows for free use of single or dual ears, supporting various situations such as business, driving, and working from home. Its ease of use and high degree of freedom are ideal for busy business people. 【Lightweight Design & Open Ear for Zero Burden Comfort】The lightweight design and open-ear design that doesn't block the ears provide comfort that is less tiring even after long hours of use. It is equipped with IPX waterproof function and Type-C charging, making it convenient for outdoor use and while traveling. It is ideal for use in business and daily life, supporting the lifestyle of business elites.