Printer model for mobile Bluetooth printing without wifi?

[JShadow]

Hi! Maybe you can help me suggesting me a printer model for my business.
I run a really small shop, where internet isn't needed at all. So I don't have any wi-fi connection there, computers neither. Just my android mobile phone (android version 10). The thing is that occasionally I have to print anything during working hours and there's no printing places nowhere near. Could I find a printer that let me print directly from my mobile phone via bluetooth or without internet/wifi/routers needed? I checked the HP Deskjet 2720 at my sister's house, that it is supposed to work via bluetooth but I couldn't connect to the printer without connecting my mobile device first to my sister's wifi network. Is there any other way? Or is there any other printer I could use? Are the "wifi direct" printers suitable for my purpose? It's a really small shop and it's not worth it to pay for an internet connection just for eventually printing. I'd also prefer a printer as cheap as possible, so thanks in advance for your answers 🙂
Thanks!

[ShlomiL]

Hi,

You cannot print over Bluetooth, but you may print wirelessly without a router using Wi-Fi Direct with any current HP printer:

https://support.hp.com/ie-en/document/ish_1841315-1637332-16

The feature is available for a Deskjet 2720 printer or for similar lower-end model, such as 3700, etc.

Shlomi