Review on 🔌 XtremPro 4x1 DP Display Port 1.2 & USB 2.0 KVM Switch Metal Housing with USB Keyboard, Mouse, Audio & Microphone Port - Black (61020) Premium Quality! by Alex Romero

1. 4K 30Hz may bother you as you see an unnatural screen. above 60Hz has a small gap between Hz, but most devices currently support 4k 60Hz. There is no reason for you to have 30Hz.2. Problem with shift key. It sometimes doesn't work and hangs in the box and the box doesn't release the back button. Of course, you cannot use the product until the button is released. I sent it back due to a button problem. And I don't believe in the quality of this brand. This can be a random problem, but it's very hard to find this problem in the KVM market. because you will be pressing the button for years. Durability is very important. I returned the product a year ago but I have not received a refund even if this product has been received at the returns center. take care of the seller.