Help About Fridge Magnet

[Lasera]

Dear All,

we want to do some changes about my friend's cafe. So we think something about quick order about best-selling products in cafe. we found the product linked below.

As a person who don't know about electronic, could you please explain which technology used, and where we can buy these items. Thank you

 

[(*steve*)]

Perhaps you should make your inquiries to Red Tomato Pizza?

 

[Lasera]

This bluetooth device is not their invention. So, if i change my question to "

i need a device that

- will be able to connect to internet via bluetooth,
- work with battery,
- will be a button (A value will be inserted to mysql db when pressed)"

what kind of Bluetooth, processors etc do i need?

Thank You