I used AirPay for about a month, but I'm selling it because I'm switching to another company. The roll paper currently in use is included. As a bonus, I'll also include one unopened roll of paper. Operation has been confirmed, and I've attached images of the printing, so please take a look. The MP-B20 connects with smartphones and tablets to achieve high-speed, high-quality printing. It's especially ideal for use in mobile environments. - Model: MP-B20 - Type: Mobile printer - Power button: Yes - Error button: Yes - Voltage: 3.7V - Current: 2.6A - Included items: Main unit only I cannot assist with setup inquiries, so please purchase only if you know how to use it. I will not be lowering the price, so please refrain from negotiations.