Two Monitors on a Raspberry Pi 4 - Demo and How To - YouTube
Loop Videos on Dual Displays Using a Raspberry Pi 4b – Danny Romano
Raspberry Pi 4 Model B 4GB microSDXC 128GB w/ Grey Dual-Fan Aluminum Case and White USB-C Power Supply - AAAWAVE
Looking for the Perfect Dashboard: InfluxDB, Telegraf and Grafana - Part XVII - Showing Dashboards on Two Monitors Using Raspberry Pi 4 - The Blog of Jorge de la Cruz
Raspberry Pi 4: Chronicling the Desktop Experience - Remote Desktop - Week 8 - LinuxLinks
Raspberry Pi 4 packs dual monitor support at $35
Amazon.com: No-Cable-Needed Drive-Free Dual-Speaker Raspberry Pi Screen 7 Inch Touchscreen Small Monitor FHD 1024×600 IPS Screen Display Portable HDMI Monitor for Raspberry Pi 4b 3b+ Pi 4 3 2 Model B Windows :
Raspberry Pi Screens: All you need to know - Yodeck