Brother Print Library is for the developer who use Brother Print SDK [Android] Ver.1.0 and develop the application software.If you want to try the printing for Brother mobile printer from Android device, Please use "Brother Print SDK Demo".In such case, you don’t need to download this library. [Supported printer]MW-140BT, MW-145BT, MW-260, PJ-662, PJ-663(Brother laser printers and ink-jet printers are not supported.)[Supported OS]Android 2.2/2.3/3.0