Flysky NB4+/NB4 Pro+ DragRacing FRM303 High Power Module Mount Installation Guide

Last Updated: May 2026 | Reading Time: 15 minutes | Difficulty: Intermediate

This comprehensive installation guide walks you through mounting the FRM303 High Power Module onto your Flysky NB4+ or NB4 Pro+ transmitter using the dedicated DragRacing module mount. This setup delivers up to 2W transmission power with a ground control range exceeding 1 kilometer, making it the perfect upgrade for high-speed RC drag racing enthusiasts.

 

Table of Contents

• I. Product Highlights
• II. Installation Steps
  • 1. Parts List
  • 2. Installing the Front Bracket Mount
  • 3. Installing the Pro+ Battery Base Frame
  • 4. Installing the FRM303 High Power Module
  • 5. Connecting the Signal Cable
  • 6. Signal Conversion Board Battery Installation
  • 7. FRM303 Power Cable Connection
  • 8. Signal Conversion Board Bracket
  • 9. Signal Conversion Board Fixing Rod
  • 10. Type-C Cable Connection
• III. FRM303 High Power Module and NB4 Pro+ Connection Setup
• Ⅳ. Purchase Link

 

I. Product Highlights

Key Features:

1. Extended Range for Racing: A must-have upgrade for high-speed RC racing cars. The FRM303 High Power Module supports up to 2W transmission power, completely eliminating control distance issues. Ground control distance exceeds 1km.
2. Adjustable Angle Adapter: The high-frequency module mount features an adjustable angle adapter, accommodating various mounting angles for optimal signal transmission.
3. Built-in Battery Support: The module mount circuit board supports 18650 rechargeable batteries and includes a low battery indicator for convenient monitoring.
4. Metal Frame Compatible: Fully compatible with metal base protective frames for enhanced durability and protection.
5. Multi-Interface Support: The module mount supports Type-C, audio, and USB-A interfaces for versatile connectivity options.
6. Broad Compatibility: Supports FS-G11P, NB4 Pro+, and NB4+ transmitters.
7. Base Battery Support: The base protective frame supports NB4 Pro+ or NB4+ base batteries for integrated power management.

Working Principle:

The system works by configuring the Type-C data interface of the NB4+/NB4 Pro+ to output a PPM signal (using the NB4+/NB4 Pro+ coaching function), and the FRM303 High Power Module is configured to recognize and process this PPM signal for extended-range control.

 

II. Installation Steps

1. Parts List

The image below shows the complete parts list for the NB4 Pro+ Base configuration:

• Cooling fan x 1
• Fan mounting screws x 4
• NB4 Pro+ Base side protective frames x 2
• NB4 Pro+ Base front protective frame x 1
• NB4 Pro+ Base rear protective frame x 1
• NB4 Pro+ protective frame screws x 4 (Hex 2.0mm)
• NB4 Pro+ Base front protective frame mount x 1
• NB4 Pro+ Base front protective frame mount screws x 4 (Hex 1.5mm)
• Signal conversion board bracket x 1
• Signal conversion board bracket screws x 4 (Hex 2.0mm)
• Signal conversion board fixing rod x 1
• 18650 battery x 2
• Signal conversion board x 1
• FRM303 signal cable x 1
• FRM303 mounting screws x 2 (Hex 1.0mm)
• Type-C cable x 1

2. Installing the Front Bracket Mount

The front bracket mount requires 4 screws (Hex 1.5mm) for installation.

1. Pre-install diagonal screws first to better align and secure the mounting holes.
2. Tighten screws until snug only. Do not overtighten to avoid damaging the screws.

3. Installing the Pro+ Battery Base Frame

The base frame requires 4 Hex 2.0mm screws for secure attachment.

4. Installing the FRM303 High Power Module

Installing the FRM303 High Power Module requires 2 Hex 1.0mm screws.

The image below shows the hole alignment between the FRM303 High Power Module and the signal conversion board:

The 2 Hex 1.0mm screw mounting hole positions:

5. Connecting the Signal Cable

The FRM303 High Power Module and the signal conversion board are connected via a terminal signal cable.

Installation position as shown above:

Installation result as shown above.

The FRM303 High Power Module switch position must remain in the OFF position during installation.

6. Signal Conversion Board Battery Installation

The signal conversion board is powered by 2 x 18650 batteries and can also charge 18650 batteries.

Battery installation must follow correct polarity: positive to positive, negative to negative. Incorrect installation will cause a short circuit and damage the main board.

After installation, switch the power to the ON position. The red indicator light will illuminate.

7. FRM303 Power Cable Connection

The signal conversion board provides power to the FRM303 High Power Module.

8. Signal Conversion Board Bracket

The signal conversion board bracket requires 4 Hex 2.0mm screws for secure mounting.

During bracket installation, pay attention to the front and back orientation. The screws are secured on the FRM303 High Power Module side.

9. Signal Conversion Board Fixing Rod Installation

The fixing rod includes a metal washer. The washer must be used; otherwise, the assembly will not be secure.

10. Type-C Cable Connection

III. FRM303 High Power Module and NB4 Pro+ Connection Setup

For detailed setup instructions, WTF has created a comprehensive video tutorial that covers the connection and configuration process between the FRM303 High Power Module and the NB4 Pro+ transmitter. Please refer to the video for step-by-step guidance on configuring the PPM signal output and pairing the module with your transmitter.