4×1 KVM Switch with RS232

Features:
• 1 set of keyboard and mouse control 4 computers to share 1 monitor
• Support Ultra high resolution 4K@60Hz and downward compatible with lower resolution
• With 4 USB ports for sharing keyboard mouse, printer, scanner, USB camera ect.
• Drive free for Windows 10/8/8.1/7/Vista/XP and Mac OS,Linux,ect, ,fully compatible with Thunderbolt 3
• Support physical button, remote control(Included) and RS232 serial control