FSY-FGR4B Flysky FGr4B 2.4GHz 4-Channel AFHDS3 Receiver

FlySky FGr4B 4-Channel AFHDS3 Receiver FSY-FGR4B

The FlySky FGr4B is a compact 4-channel 2.4GHz receiver built on FlySky’s modern AFHDS3 protocol, designed for reliable, low-latency control in RC cars, trucks, crawlers, and boats. It’s widely used with higher-end FlySky radios like the Noble NB4 series because of its fast response and stable signal performance.

Unlike gyro-equipped versions (like the INR4-GYB), the FGr4B does NOT include a built-in gyro—it’s a clean, standard receiver focused on signal quality and flexibility. It supports multiple output types including PWM, PPM, i-BUS, and S.BUS, making it compatible with a wide range of ESCs, servos, and accessories.

Key features:

• 4-channel AFHDS3 receiver for cars, trucks, and boats
• No built-in gyro (pure receiver, no stabilization)
• Dual/strong antenna design depending on revision for better signal stability
• Multi-output support: PWM / PPM / i-BUS / S.BUS
• Wide voltage input: ~3.5V–9V
• Lightweight, compact design (~6.4g class)
• Low-latency response for racing and bashing setups