What is the company/product? I'm curious about an all-in-one solution as I already do this with an extra Mikrotik router and things like pi-hole or OpenDNS. Currently a mAP [0], but there are more inexpensive options.
The mAP is just what I have laying around, it's small and usually in my bag anyway. Plus, it has 2 ethernet ports so I can use it as a router/AP in a wired environment too.
To power it I use a microUSB cable to my laptop, or a phone charger, or a battery pack with the microUSB cable.
[0] https://mikrotik.com/product/RBmAP2nD