HDMI Splitter14Front key Lock / Unlock settingFront KeyLock Press the selected number in the front (① or ②) for 2~3seconds.Unlock After pressing ‘F’ key 3 times, and press all numbering keys(①->③->②->④) in order.IR RemoteLock After pressing F key 3 times, and press input 1 button.Unlock After pressing F key 3 times, and press input 2 button.NoteIf the front button is locked,- All LEDs for input will be blinking.- All other button including Power will not be working. It is only possibleto use the front button to unlock the setting.LockUnlockUnlockLock