The EasyFlash has two lights on its back, next to the button. The one nearer the USB-C port is blue. The other one is red or green, never both at once.
Click a row to play it on the model.
Every press of the button shows the blue and red flashing while it's held. Let go within 5 seconds and the blue light flashes quickly for a minute, ready to approve the next Bluetooth pairing, then the lights show blue and green. Hold it for 5 seconds and the EasyFlash restarts into its factory firmware. See Button.