USB 3.0 KVM switch that can switch between 4 PCs. With a single switch, you can switch between 4 computers and use one monitor, one keyboard, and one mouse. - Brand: GREATVIK - Number of ports: 4 PC switching buttons - USB ports: USB 3.0 x 4 - HDMI ports: HDMI 1.4 x 4 - Power input: DC 5V - Accessories: USB cables x 3 - Size: Compact design Thank you for viewing. Included are the main unit, 3 USB cables, and a USB Type-C to A cable for power. You will also need a commercially available USB Type-C power adapter. While there are many switches that switch between 2 PCs, 4 PCs are quite rare.