Overview The new JR Slimline R700 FM Receiver, which will replace the R600 as JR's new baseline FM aircraft receiver in future systems. Not only does the R700 have one more channel than the R600, but it's actually slimmer in design and weighs less than 1oz. Because of its smaller size, it is just as at home in a narrow sailplane or park flyer fuselage as it is in the more spacious confines of most glow-powered aircraft. Like all JR FM receivers, the R700 features the excellent interference protection of JR's patented ABC&W circuitry. JR's R700 7-Channel FM Slimline Receiver is compatible with any current JR FM aircraft system.