The JR R921 receiver combines Spektrum's exclusive, patent- pending DSM2 protocol plus the brand's DuaLink feature-and the result has been revolutionary. The radio system simultaneously transmits on two frequencies, creating dual RF paths. This dual path redundancy, plus the fact that each of the two receivers is located in a slightly different location exposes each to a different RF environment and creates a superior path diversity RF link in all conditions.

Ultra-Speed servo for instant tail control. Ultra precision nylon gears. Perfect for 450-size helis. Fast transit time for superb response. Employs metal gears for extreme strength. Zero dead band provides JR's legendary precision. High holding power provides a unique feel.