I purchased these for meetings, but they didn't suit me as I preferred another model, so I haven't used them. They've been used a few times. Product Information Brand: JVC Kenwood Color: Black Ear Placement: In-Ear Headphone Type: In-Ear Noise Control: Active Noise Cancellation Headphone Jack: USB 【High-Quality Call Function for Clear Voice Transmission】Equipped with two high-performance MEMS microphones for calls and Qualcomm cVc technology, suppressing ambient noise for clear hands-free calls. Enables comfortable voice communication during telework online meetings, etc. 【Clear Sound for the Other Party】Features a 10.4mm high-power neodymium driver unit that reproduces a balanced sound from low to high frequencies. Delivers high-quality sound, allowing you to hear the other party's voice clearly. 【Supports Long Continuous Calls】Allows for approximately 7 hours* of continuous call time. Also supports a continuous standby time of approximately 1 week (approximately 164 hours)*. *: Varies depending on usage conditions. 【Detachable Ear Hooks Included】Includes detachable ear hooks to prevent the main unit from falling. Spare hooks are also provided in case of loss. 【Stress-Free Operation】Adopts a flat design multi-function button with a light click feel and a wide, easy-to-press touch point. Basic functions such as call start/end and redial can be operated without stress. Adopts a symmetrical design that can be worn on either the left or right ear.