RadioLink R4FGM 4-Channel RC Receiver with Gyro Function

The RadioLink R4FGM (Part No: RLKR041004) is an ultra-compact, 4-channel receiver engineered for micro-scale surface models, such as 1:28 and 1:64 scale drift cars (like Mini-Z) and small RC boats. Despite its featherweight 3g design, it features a professional-grade integrated gyroscope and high-speed FHSS frequency-hopping technology to ensure stable, interference-free control in competitive environments.

Key Features:

• Integrated Stability System: The built-in gyro assists in maintaining a straight line during acceleration and prevents spin-outs during high-speed cornering or drifting. Sensitivity can be adjusted in real-time via the transmitter's VR switch (CH3).
• Micro-Scale Optimized: Measuring only 25mm x 13mm, it fits easily into the tightest chassis, including Hot Wheels conversions and "Mosquito" class micro-drifters.
• Impressive Ground Range: Offers a reliable control distance of up to 400 meters (1312ft), which is exceptional for a receiver of this size.
• Digital Servo Support: Versions manufactured after April 2023 support ultra-fast 3ms/4ms response speeds when paired with the RadioLink RC8X, providing near-instantaneous steering feedback.
• Reverse Polarity Protection: The unique circuit design prevents damage to the receiver even if the battery or ESC is plugged in with the polarities reversed.
• High Voltage Compatibility: Supports a wide operating voltage (up to 10V on V2.2 units), allowing for the use of 2S LiPo power and high-voltage servos without a BEC.

Technical Specifications:

Working Mode & Gyro Setup:

The R4FGM has two distinct working modes indicated by the LED color. Pro-Tip: To toggle the gyro on or off, quickly press the ID SET button 3 times within 1 second.

• Standard Mode (Green LED): Standard PWM output on all 4 channels; gyro is disabled.
• Gyro Mode (Green + Red LED): Gyro stabilization is active. If the car turns the wrong way when correcting, quickly press ID SET twice to reverse the gyro phase.

Startup Note: Because the gyro performs a self-test on power-up, the vehicle must remain completely still for 1–2 seconds after you plug in the battery. If the vehicle is moved during this time, the gyro may not initialize correctly, leading to erratic steering.