A mini UPS with 5V, 9V, 12V DC output and optional PoE can be used to power a WiFi access point, a broadband router, an SBC, ...
The Arzopa A1M Portable Laptop Monitor does its duty to be that additional monitor you need for your productivity.
Compact and durable adapter featuring 4K@60Hz resolution support-perfect for connecting USB-C devices to HDMI displays.