Payoff and Cashflows
The investor pays a coupon times a fixed rate in currency c1 and receives a coupon times a fixed rate in currency c2 times current FX rate divided by the FX rate at the inception of the deal. However, the cash flows are always guaranteed to be positive for the investor. The investor, therefore, has the option to receive cash flows making the payoff similar to a Bermudan style FX option. The swap house is, thus, selling a series of Currency options with a floating rate as a premium; the rate is usually subtracted with a spread.
where
Read more about this topic: Power Reverse Dual Currency Note