The RCH Smart Keyboard application allows you to send commands to Onda RT, Spot R RT, Walle Mec RT, K-Bill RT and Print! F directly from the screen of an Android tablet or smartphone in a quick and intuitive way, facilitating the daily operations of the 'merchant. The complex and limited key combinations on the ECR leave room for a user-friendly interface that makes access to the main checkout functions immediate for: carry out departmental sales. The application synchronizes the departments already programmed and makes them available in quick scrolling lists; issue commercial documents, choosing on the screen the payment method with which to proceed between cash or cards; change the account or quantity before issuing the commercial document; print reports and cancel commercial documents; print courtesy receipts; participate in the Lottery of Receipts by reading the code from the camera; check the status of the DGFE (space occupied / free space) and request technical assistance in time for replacement; perform fiscal closures with a dedicated key.