A: Rapid flashing (5x per second) indicates a stuck button. Check for debris under the keypad.
A: Older or budget versions combine COM and STOP internally. Check the label on your specific unit. aodelan wtr2 user manual
If your specific WTR2 variant has unique features (e.g., display screen, joystick, or different button layout), refer to the label on the back of the transmitter for the exact model code, then adapt the relevant sections above. A: Rapid flashing (5x per second) indicates a stuck button