The Unifrog format replaces the erstwhile Insulfrog and Electrofrog format, a combination of both. As supplied the turnout is set up to work like an Insulfrog turnout, but with the connected wire to the independent frog tip the turnout can be operated like an Electrofrog, the wire allowing the switching of the polarity - described as """"powering the frog"""". What's in the Box: PECO Streamline HO C70 #6 R/H Turnout