I have stored this at home after opening it, with almost no use, so I believe there is almost no battery degradation. I am selling it because it's a waste. AI Noise Reduction Function Suitable for Calls Equipped with VoiceShield technology, which uses AI to recognize ambient noise common in remote work/office environments and public places, as well as your voice, and transmits your voice loudly while removing that noise. This allows you to clearly convey your voice to the other party in web conferences and phone calls, providing clear and stress-free communication. *Beamforming technology provides directionality towards the speaker's voice. Active Noise Canceling (ANC) Detects surrounding noise and removes it with Active Noise Canceling (ANC). You can concentrate on work or meetings, or enjoy music without worrying about the surrounding sounds. Two Wireless Connection Methods While it takes time to select devices with a normal Bluetooth connection, the Anker PowerConf H700 also supports wireless connection with the included Bluetooth USB adapter. You can easily use it by simply connecting the USB adapter to your PC's USB port, and you can easily connect wirelessly without complicated initial settings. Long Talk Time Up to 21 hours of talk time in noise-canceling mode and up to 24 hours in normal mode on a full charge. You can also enjoy up to 28 hours of music playback in noise-canceling mode and up to 35 hours in normal mode. Easy Mute in One Step Equipped with a smart mute function. You can easily mute by simply lifting the microphone part. Also, by turning on "Auto Mute" from the AnkerWork app or PC version of AnkerWork software, you can mute by lifting the ear cup on the microphone side away from your face. Multi-Point Support The Anker PowerConf H700 can connect to two devices simultaneously. You don't need to switch Bluetooth connections each time, and you can smoothly switch between using your PC for web conferences and your smartphone for music, etc. *Only one device can play at a time. Short Charging Time You can talk for about 3 hours with a 5-minute charge. You can use it with peace of mind even if you have a sudden web conference or phone call. Thank you for viewing.