How can I get Pocket WiFi?

I'm curious about how one can acquire a Pocket WiFi device. Could you elaborate on the steps I should take? I understand it's a convenient way to stay connected on the go, but I'm not sure where to start. Are there specific retailers or online platforms that offer these devices? Are there any specific features I should look for? Additionally, what are the costs associated with purchasing and maintaining a Pocket WiFi? Your insight would be greatly appreciated as I explore this option for my travel needs.