Download keyboard firmware from "Mistel Support". Must be in "USB mode", and "remove the DONGLE receiver". Open the keyboard firmware and press "Start" button to begin update. Open the Bin Loader. Click on "BIN File" Button to import the Bin file, then press "Download Data" button to start the update. *BIN update progress will be displayed on the keyboard's screen. Please do not disconnect the USB cable during the process to ensure the update is completed successfully.  

Download SYNC-TIMER software. Must be in "USB mode", and "remove the DONGLE receiver". Open the SYNC-TIMER software, and directly plug the cable into the keyboard to synchronize automatically.  *The Model Name must be displayed as MD750 Delight, as shown in the image below.