4K KVM switch for desktop and laptop, supports fast charging, with an 18-month warranty. - Model: A834K - Function: 4K KVM switch - Compatibility: For desktop and laptop - Warranty: 18-month warranty - Charging Technology: Supports fast charging Allows you to use multiple PCs with one monitor, keyboard, and mouse. Especially compatible with Mac, and also supports USB au PAY Delivery, enabling use with both Mac and Windows. It's very convenient because you don't have to re-plug the keyboard every time. I've only used it once. The condition is excellent, and everything is included.