Absima Channel 4-Channel Radio CR4S V2 Including Receiver 2.4GHzFEATURES Description of the channels (the transmitter has 4 channels which are assigned as follows): CH1: Steering wheel CH2: Throttle lever (Trigger) CH3: 3 position toggle switch CH4: Push button Reverse function (REV): This function can be used to set the direction of rotation of the steering servo motor. Trimming (TRIM): Adjustment of the straight run and throttle neutral position. Dual Rate function (D R): The steering angle and also the motor