KO Propo EX-RR Limited 2.4GHz Radio System w/KR-415FHD Short Antenna Micro Receiver

KO Propo
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Low Price: $464.00
Discontinued Online

The KO Propo EX-RR Limited 2.4GHz Radio System includes a limited edition carbon graphic, the optional battery stand, and the KR-415FHD short antenna micro receiver. This is a pro level transmitter, with pro level features, that delivers pro level performance.


  • This products does not include the manual in the package. Please download from the resources tab above.


  • Limited Edition Carbon Print Battery Stand: The limited edition carbon battery stand offers a good balance and feel, with the ability to use LiFe or LiPo batteries.
  • Improved Direct Throttle Feeling: The redesigned throttle unit has increased the direct feeling, with a lengthened throttle trigger and operational angle. In order to not influence the operational angle, the distance to the finger from the angular sensor has created a more direct feel, and maintains a compact and comfortable size. The increase of this linear feeling allows for smoother and faster reaction with input on the throttle and brake.
  • Spring Tension Adjustment: Trigger spring tension = personal preference. The updated trigger unit provides a spring tension adjustment with a screw. This allows for a stronger or softer spring tension according to personal preference.
  • Long Life Angle Sensor Smoothness Does Not Change: The redesigned angle sensor has proven to deliver a precise signal and extreme durability. Because the signal is so precise, delicate movements are fluid. The durability of the sensor has shown approximately an improvement of 100 times over the sensor used in the past.
  • Smoother Steering Unit: The soft spring can be operated with a constant tension. The normal spring included in the extension unit has been modified. The previous spring was a progressive spring becoming stiffer as the wheel angle increased, but the softer spring gives a linear stiffness as the wheel angle increases. Since the spring tension can be adjusted, you can set the spring tension to your personal preference.
  • Small Diameter Wheel: The aluminum wheel was developed throughout multiple test runs to find the best diameter, improving wheel reaction. The diameter of the aluminum wheel is 2mm smaller and the weight is the same as a plastic wheel, providing the rigidity of aluminum with a light operation feeling.
  • Comfortable Wheel Sponge Material: The wheel sponge material has been changed to improve the feel to the fingers. The increased comfort helps to reduce fatigue during a long race.
  • Evolved Software Calculator has Rollout Function: This function has been added to the calculator in the EX-2. Put TYRE DIAMETER in the calculator, ROLLOUT (Car movement distant per one motor rotation) is automatically calculated. This is useful for changing gearing in a DD car.
  • Push Control Function for Direct Drive Car: A motor that has a strong magnetic force will add a braking effect when the throttle is released and will make a car stall in the corner. Setting the amount of forward input to remain on the throttle as the trigger returns to neutral can be adjusted. This is effective for F1, WorldGT and 1/12 category of cars whose gear ratio is small.
  • English⇔Japanese Language Options: You can change language in the display from Japanese and English. Selecting the display language that you prefer to use.
  • Add various performance functions such as down timer and more.
    • Individual response settings for the steering and throttle.( Feel setting menu)
    • Display RF mode (FH-G/ FH-F /MzMHS G/MzMHS F)
    • 2 way setting point in the Steering Speed
    • 3 way Setting point in the Throttle Speed
    • Full acceleration settings
    • Full ABS Settings
    • Balance L/R added in the Steering override
    • Add User timer
    • 40 model memory
  • KR-415FHD Short Antenna Receiver Included: This receiver includes two receiver devices in one package. This adds high precision reception and reliability with two receivers. Also compatible with the new HCS operation.

Function Summary

  • Model: Model Select / Model Name / Model Copy / Model Reset / All Reset
  • System: Display / Battery / Calculator / Sound / VR Information / Config / Key Speed / Menu Speed / Language / Operation time / User timer
  • Steering: Steering Travel / Steering Balance / Steering Trim/Steering Sub Trim / Steering Trim rate / Steering Speed Turn(2way) / Steering Speed return (2way) / Steering Curve / Steering Punch / Steering Feel / Steering Response / Steering Auto Trim / Steering Auto Balance /Steering Reverse
  • Throttle: Throttle travel F / Throttle travel B / Throttle Trim/Throttle Sub Trim / Throttle Trim rate / Throttle Speed Turn(3way) / Throttle Speed reTurn(3way) / Throttle Curve / Throttle Punch / Throttle Feel / Throttle Response / Push Control/ ACCEL / ABS / Auto Start / Idle Up / Neutral Brake / Throttle Override / Throttle Reverse
  • 3ch/4ch: KEY Setting / 2WAY / 3WAY / 5WAY / ANALOG / Gyro / Twin Servo / 4WS/AMP Mixing / Throttle Mixing / Trim Set
  • Timer: Timer Start / Trigger Start / Lap history / Start Stop Key / Lap Key / Lap Navi / Alarm time / Pre Alarm / Alarm Mode / Timer Mode (Lap Timer/Down Timer)

Dimensions: 230163107mm
Weight: 536g (not included battery)
Battery: RO3/AAA/UM4 battery x 4
Current: 150mA
Using time: 4 or 5 hours( with alkaline battery)
Channels: 4 channels
Frequency: 2.4GHz(FHSS)
Model memory: 40
Receiver: HCS compatible KR-415FHD included
Compatible Receivers: KR-413FH,KR-241FH,KR-211FH,KR-212FHG.


  • (1) Master Unit EX-RR
  • (1) LCD Xpansion Unit EX-104S
  • (1) Aluminum Steering Wheel 3
  • (1) Drop down Extension Unit (Included soft spring)
  • (1) Expert Grip Unit2 (right)
  • (1) Carbon print battery stand
  • (1) KR-415FHD Short Antenna Receiver
  • (1) RX mode selector

This product was added to our catalog on August 22, 2017