How do I activate the child lock on the YAP1F remote controller to prevent accidental button presses?
Press the up and down buttons simultaneously to lock all buttons on the remote controller, and the lock icon will be displayed. Press the same combination again to unlock the buttons. If buttons are locked, the lock icon will blink 3 times when any button is pressed and the operation will be invalid. (Page 6)
From the official Gree Yap1f IR Remote Control manual, page 6
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