Aquacraft UL-1 Superior Fe Hydro RTR 2.4GHz The racing RTR with all the extras — and no equals! There’s never been a LiPo-ready hydro with brushless power and 2.4GHz technology — until now. The UL-1 Superior has been designed in the U.S.A. to deliver today’s best in cutting-edge control, brushless performance and competition-quality features! Features high-performance GrimRacer hardware and an optimized-for-brushless hull design developed by Mike “Grimracer” Zaborowski! Includes a brushless marine motor and ESC custom-designed to meet UL-1 performance requirements. Drive system uses a standard 0.150” flex drive and 3/16” prop shaft to provide race-quality response and reliability. Ideal for IMPBA and NAMBA FE Sport Hydroplane Class events.