Connection steps:
Step 1. Connect 2*DP cables+1*HDMI+1*USB-A cable between PC 1 and KVM (INPUT A1, INPUT B1,INPUT C1,USB 3.0).
Step 2. Connect 2*DP cables+1*HDMI+1*USB-A cable between PC 2 and KVM (INPUT A2, INPUT B2,INPUT C2,USB 3.0).
Step 3. Connect 2*DP+1*HDMI cables between the KVM (OUT A, OUT B,OUT C) and your 3 monitors.
Step 4. Connect the DC12V power adapter.
Step 5. Insert your USB devices(keyboard mouse and U disk) into the USB port on the KVM.