Horizon Hobby Announces the Spektrum DX4R Pro Radio System The lightweight DX4R was conceived by racers for racers to deliver an unparalleled combination of balance, sophistication and speed.   Built around frequency-agile, Spektrum™ DSMR technology, it’s capable of maintaining a blazing 5.5 ms frame rate Frame rate (with the included SR2000 receiver) in the busiest […]