Radio Controller for RC Helicopters
The radio control system consists of a transmitter, receiver and servos. They operate on a specific frequency which can be changed by using frequency crystals.
There are many types of radio controllers. The simplest are those designed for rc cars. The more complex units, with 3 or more servos, are used for rc airplanes and helicopters.
Buy a radio controller designed for rc helicopters. These have special functional capabilities not available in radio controllers designed for rc cars or airplanes.
RC Helicopter Guide
Mini RC Helicopter - Remote Control
Helicopters, Radio Controlled Helis, R/C Stores
RC Hobby Stores