I am selling this item because I accidentally purchased two of them. Although this item is new, I have opened the package and paired it with a smartphone once to confirm its functionality. I own another one of these and am very satisfied with the product. I used to use a headset with an external microphone, but I wanted to switch to a built-in microphone type, so I purchased this. It has four built-in microphones that capture immersive sound. It supports BT 5.4, has ANC functionality, comes with a storage case, and is equipped with a proprietary 2.4GHz connection dongle, making it compatible with multiple devices such as PCs, smartphones, Switch, and PS5. The item itself is also very light and doesn't cause any pain on the top of the head. The texture is also very good. Thank you for your consideration. - Model: Wireless Headset - Bluetooth Version: BT 5.4 - Features: ANC (Active Noise Canceling) - Accessories: Storage Case - Design: Over-ear Thank you for viewing.