Tekin R1 Series Brushless ESC is truly the highest performance speed control line ever produced by Tekin. The R1 redefines electric RC, delivering blinding speed, intense power, and precise control without sacrificing size and weight! The R1 can also run Brushed motors and has Voltage Cutoffs to safely run with Lithium battery packs. The R1 is the premier choice of hi-end Brushless/Brushed speed controls! The R1 features, on-board programming, quicktune one-touch programming, PC Interface for Custom Programming *Requires Tekin HotWire, solder posts for easy wire replacement, pit tune mode, digital glitch filtering, touch radio calibration and on-board temperature indicator.