Go to menu/administration (in the top right corner of the screen):
At opened admin-panel click « Settings » press the button add printer and in the opened window make printer setup, choose model/type etc. If you have any difficulties, you can write to the support team. (Icon in the lower right corner of the screen)
Setting printing on tablet/phone
Connect printer to your tablet/phone by means of otg-cable or directly if your device has full-sized usb-input
In the admin panel at the section Devices on the tab Manufacturer choose Другой, model - Любая, operating system - Android or iOS. Choose the right width of check (depends on printer). Add logotype if needed. Just press a big blue plus button (filetype png), put auxiliary options and press the button Save. Than go to pos terminal and check printing.