This is the KENWOOD KH-M700-B. I bought it remotely, but I haven't had a chance to use it, so I've only used it once. It's a KENWOOD wireless single-ear headset with noise-canceling function. - Clear communication for online meetings during telework, etc. High-quality call function that transmits voice clearly Equipped with two high-performance MEMS microphones for calls, it suppresses ambient noise and enables clear hands-free calls. It provides comfortable voice communication for online meetings during telework, etc. - Active noise cancellation function for receiving calls You can hear the voice of the caller clearly even in environments where ambient noise is a concern. - Stable wireless connection with less voice interruption It adopts Bluetooth® standard Ver. 5.0/Power Class 1, realizing a stable wireless connection. - Multi-point support, can connect to two devices simultaneously It supports multi-point, which allows you to connect to two devices simultaneously, and you can use it without having to switch Bluetooth® connection settings when having an online meeting on your computer and making a phone call on your smartphone. - High-quality sound with clear calls The 10.4mm high-power neodymium driver unit reproduces a balanced sound from low to high frequencies. You can also hear the voice of the caller clearly. - Approximately 7 hours of continuous talk time Approximately 7 hours of continuous talk time is possible. Also, the continuous standby time is about 1 week (about 164 hours). - Waterproof for everyday use, so you don't have to worry about rain or splashes - Comes with two types of ear tips to choose from In addition to the standard ear tips, it comes with support ear tips that provide a stable fit, allowing you to choose your preferred wearing style. - Symmetrical shape that can be worn on either ear Thank you very much.