Engineered from the ground up, the Hydra XLX2 ESC is packed with a potent combination of hardware and software advancements, sensored performance, CRYO-DRIVE and waterproof design that will set a new standard for high performance power systems for R/C boats up to 50”. CRYO-DRIVE, Castle's proprietary breakthrough technology integrates unique software and dedicated hardware to reduce heat and dramatically increase performance. Thousands of times per second, the Hydra XLX2 software minimizes the amount of time the electrical components spend generating heat. The results are more power handling, cooler ESC temperatures and longer runtimes and for ultra-high performance. Additional tuning flexibility awaits you with on-the-fly adjustments from your transmitter via the Auxiliary wire. Simply connect the white signal wire to an open radio channel and enable the feature in Castle Link by selecting what Auxiliary function you would like to use. Access programming parameters such as Torque Control, Max Brake or Max Throttle. You can easily optimize the ESC for any running conditions. Create, save and download setup profiles through the Castle Link Programming Suite on your Windows PC (coupon for free Castle Link adapter included with purchase), or wirelessly with the convenience of the new B-Link Bluetooth Adapter and Castle Link app for Android or iOS. Please refer to the Hydra XLX2 Product Use Statements (in document section) for information regarding calibration, input voltage, minimum battery requirements, wiring, soldering, connectors and more. It is critical that all relevant components in your system be able to support the incredible power handling and performance of the Hydra XLX2.