I purchased this new and used it for about a year. Wireless connection has been confirmed to work. The left click is sometimes unresponsive, which may be due to low battery or an old PC? It would work fine after using it for a while, as if it got used to it. Please judge the condition from the product images. A wireless mouse with an ergonomic design and multi-function buttons. - Model Name: MX Master 3S - Color: Gray - Number of Buttons: 6 - Connection: Wireless - Charging: USB-C Thank you for viewing.