Modern RC helicopters are complex machines and, for the most part, depend on multiple on-board systems to produce the performance that most pilots demand. In addition to the radio receiver and servos, today's helis will typically carry at least one voltage regulator, a throttle limiter or governor, and a gyro. As is often the case with this type of setup, a minimum of seven channels is required (assuming that gyro sensing and limiter/governor speeds are to be controlled remotely). Finally, throw in the cabling needed to connect all this stuff together and the heli begins to resemble the underside of your car's dashboard. Enter Spektrum. The company that revolutionized the R/C industry with 2.4 GHz radio systems has once again introduced a distinctive product; the industry's first purpose built heli receiver. The AR7100 and AR7100R receivers both contain multiple systems, thus reducing the number of single purpose products. The benefit - fewer individual products means less weight and easier installation. The benefit of the benefit - eliminating the external cabling and connectors between products increases reliability and reduces power loss.