Portable bluetooth printer for android?

Question

Android

There was a need to use a portable bluetooth printer (56-80 mm) for printing receipts. It is supposed to be used in conjunction with its own android application.
An Internet search gave the following results: Zebra
printers - there is an SDK for android, the cost on the market is from 35,000 rubles; Star sm-t300 , SDK, 23,000 rubles; Brother printers , SDK, from $850 in the USA. There are also a huge number of Chinese printers worth about $ 100, declaring support for android. For example, 1 and 2 .
Has anyone used devices of this kind in conjunction with an android? What are the pros, cons, pitfalls when using? How difficult is it to integrate with your own application?

Answer 1

And this one ?

Answer 2

By the way, we used this one http://www.aliexpress.com/store/product/2pcs-lot-MPTII-BT-android-printer-bluetooth-USB-serial-portable-printer-1500mA-li-ion-battery/105525_760577195 .html
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