Etronix’s EX4GT 4-channel radio control system uses the latest in 2.4ghz radio technology to ensure that each transmitter’s frequency remains secure from external interference. The EX4GT benefits from 2 extra Aux switched channels, one is a 2 stage and the other a three stage switch. Ideally suited to r/c car and boat applications upto 120m. Features 2.4GHz Spread Spectrum GFSK Crystal Free 4-Channels (2 x Proportional, 1 x Three Stage Switch, 1 x Two Stage Switch) Easy to use Control for Basic Models GFSK Modulation Steering and Throttle Trim Adjustment Steering and Throttle End Point Adjustment Steering and Throttle End Dual Rates Servo Reversing Fail Safe Function 4 x AA Batteries to Power (required) Surface Range 120M EX4GT Receiver Specifications Channels: 4 Voltage Range: 4-6.5V Waterproof: IP67 Connections: Accepts Futaba/JR Size: 33 x 22 x 13mm Weight: 5g