The Splitter is typically used when you have a jacket liner and a set of gloves, but only a single temperature controller. **To install the Splitter, use the two male plugs on your Jacket Liner on the Y end, and plug your temperature controller to the single end. **Max capacity is 20 amps **WARNING: A Splitter is not to be used to run 2 sets of heated clothing. Overheating, fire, or damage to your products could occur.