If your question is as to whether these will support Square POS hardware, if you can install the Square POS app on the device and access Bluetooth and Wi-Fi networks as well as connect a wired device via micro USB it *Should* connect and work, as to whether the accessories on the device will be compatible, you can check that here: https://squareup.com/shop/hardware/gb/en/products/accessories
*No guarantee the device will work with square however it is the external hardware doing the work so there should be minimal limitations to connecting/using the device.
