The Synchronizer is a logic gate that functions as 2 RS Latches connected to an AND Gate. When its left or right sides are powered, the corresponding light will turn on. When both lights are on, it will briefly emit a redstone pulse, and then reset. It will also reset if its middle input is powered.
A Synchronizer can be used similarly to an AND Gate, with one major difference. While an AND Gate requires multiple inputs being powered simultaneously, a Synchronizer does not.