ETRONIX PULSE EX4S 4CH 2.4GHZ FHSS STICK RADIO SYSTEM Features 4-Channel Easy to use Control for Basic Surface Models Spread Spectrum 2.4ghz FHSS Mode Digital Steering and Throttle Trim Adjustments Steering Dual Rate D/R Adjustment Throttle Dual Rate D/R Adjustment 3 channel Toggle Switch 4 channel 3-Position Toggle Switch Servo Reversing Failsafe Function Charging Jack Port Plug in Battery Box 200m Surface Range