The Phoenix Edge 130 is a 130-Amp ESC with a user-programmable auxiliary wire which can be used for several purposes including: Helicopter gain input adjustments mid-flight Serving as an audible beacon after an unexpected landing Acting as an RPM output for 3-axis gyros that support RPM sensors Be used as an ESC arming lock (coupon for free Arming Lockout Key included) Or as a a receiver arming lock Combined with the data logging capability that Edge controllers are renowned for, you will experience great versatility with the Phoenix Edge 130. This speed controller also features leading software functions and USB programming capability with the Castle Link USB adapter (free with included coupon). This ESC is designed for 550-class or 600-class helicopters and 1.20-size fixed wing models and comes with a 5-Amp BEC. Order yours today.