Radiomaster ELRS USB UART Flasher V2 is a practical converter from USB to UART serial link. The converter can be used for flashing ELRS receivers, but its applications are wide ranging. The UART is brought out on 2.54mm pins or connector. The output voltage of the converter can be switched between 3.3V and 5V. There is also a button on the converter for easy restart of the connected device.