1. Introduction
This manual provides essential information for the safe and effective use of your Radiomaster Boxer Crush Radio Controller Transmitter. The Boxer Crush is a high-performance radio controller equipped with the EdgeTX operating system and an ExpressLRS RF system, designed for remote control applications. Please read this manual thoroughly before operating the device to ensure proper setup, operation, and maintenance.
2. Package Contents
Verify that all items listed below are present in your package. If any items are missing or damaged, contact your retailer.
- 1 * Boxer Crush Radio Controller
- 1 * Signature Carry Case
- 1 * T Antenna
- 1 * USB-C Cable
- 1 * Gimbal Protector

Figure 2.1: Radiomaster Boxer Crush Package Contents
3. Product Overview
The Radiomaster Boxer Crush features a robust design with high-precision components. It is powered by an STM32F407VGT6 microcontroller with 1MB Flash and 192KB RAM, ensuring smooth operation of the EdgeTX system. The controller is equipped with CNC Aluminum AG01 Hall-effect Gimbals for precise control input.

Figure 3.1: Front View of the Radiomaster Boxer Crush

Figure 3.2: Rear View of the Radiomaster Boxer Crush
Key Features:
- CNC Aluminum AG01 Hall-effect Gimbals for enhanced precision.
- Pre-installed EdgeTX Operating System.
- Integrated ExpressLRS RF System.
- Redesigned SD card slot with a pre-loaded 512MB SD card.
- Available in multiple vibrant colors.
4. Setup
4.1 Initial Charging
Before first use, fully charge the internal battery using the provided USB-C cable. Connect the cable to the USB-C port on the transmitter and to a suitable USB power source (e.g., computer, USB wall adapter). The charging indicator will show the charging status.
4.2 SD Card Installation
The Boxer Crush comes with a 512MB SD card pre-loaded with necessary EdgeTX files. Ensure the SD card is properly seated in the redesigned SD card slot before powering on the transmitter.
4.3 Powering On/Off
To power on, press and hold the power button until the screen illuminates. To power off, press and hold the power button until the shutdown prompt appears, then confirm. Always ensure the transmitter is powered off when not in use.
4.4 Basic Navigation (EdgeTX)
The EdgeTX operating system is navigated using the scroll wheel and buttons. Refer to the on-screen prompts and the comprehensive EdgeTX manual (available online) for detailed navigation and configuration instructions.
5. Operating
5.1 Binding with a Receiver (ExpressLRS)
The Boxer Crush utilizes the ExpressLRS RF system. To bind your transmitter to an ExpressLRS receiver:
- Ensure both the transmitter and receiver are powered on.
- Navigate to the ExpressLRS menu on your transmitter (usually under 'TOOLS' in EdgeTX).
- Select the 'BIND' option. The transmitter will enter binding mode.
- Power cycle your receiver three times. On the third power-up, the receiver should enter binding mode (indicated by a slow flashing LED).
- Once bound, the receiver's LED will become solid.
5.2 Model Creation and Selection
Use the EdgeTX interface to create new models for your aircraft or vehicles. Each model allows for custom settings, including channel mapping, mixes, and flight modes. Select the appropriate model before each flight.
5.3 Safety Guidelines
- Always perform a range check before flying.
- Ensure all controls respond correctly and in the intended direction.
- Never operate your RC model in crowded areas or near people.
- Keep the transmitter's antenna fully extended during operation.
6. Maintenance
6.1 Cleaning
Wipe the transmitter with a soft, dry cloth. Avoid using harsh chemicals or solvents that could damage the casing or screen.
6.2 Firmware Updates
Regularly check for EdgeTX firmware updates on the official EdgeTX website. Updating the firmware can provide new features, bug fixes, and performance improvements. Follow the instructions provided with the firmware update carefully.
6.3 Battery Care
Store the transmitter with the battery at approximately 3.8V per cell for optimal longevity if storing for extended periods. Avoid fully discharging or overcharging the battery.
6.4 Gimbal Care
The AG01 gimbals are designed for durability. Keep them free from dust and debris. Use the provided gimbal protector when transporting the transmitter.
7. Troubleshooting
7.1 Transmitter Not Powering On
- Ensure the battery is charged.
- Verify the battery is correctly connected.
- Check the power button for proper function.
7.2 No Signal to Receiver
- Confirm the transmitter and receiver are correctly bound.
- Ensure the transmitter's internal RF module (ExpressLRS) is active and configured for the correct protocol.
- Check the antenna connection on both the transmitter and receiver.
- Verify the receiver is powered.
7.3 Gimbal Issues (e.g., erratic movement, no response)
- Calibrate the gimbals through the EdgeTX system menu.
- Inspect gimbals for physical obstructions or damage.
For further troubleshooting, consult the EdgeTX documentation or the Radiomaster support resources.
8. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 7 x 6 x 4 inches |
| Manufacturer Recommended Age | 18 years and up |
| Microcontroller | STM32F407VGT6 (1MB Flash, 192KB RAM) |
| Gimbals | CNC Aluminum AG01 Hall-effect |
| Operating System | EdgeTX |
| RF System | ExpressLRS |

Figure 8.1: Radiomaster Boxer Crush Dimensions
9. Warranty Information
The Radiomaster Boxer Crush Radio Controller Transmitter is covered by a manufacturer's warranty against defects in materials and workmanship. Please retain your proof of purchase. For specific warranty terms and conditions, refer to the documentation included with your product or visit the official Radiomaster website.
10. Support
For technical assistance, firmware updates, or additional resources, please visit the official Radiomaster website or contact their customer support. Online communities and forums dedicated to EdgeTX and ExpressLRS can also provide valuable information and peer support.
11. Additional Resources
Product Videos
Video 11.1: Radiomaster Boxer Crush Overview (0:28). This video provides a general introduction to the features and design of the Boxer Crush radio controller.
Video 11.2: Radiomaster Boxer Crush Feature Highlight (1:03). This video demonstrates specific key features and functionalities of the radio controller.
Video 11.3: Radiomaster Boxer Crush Setup Guide (1:05). This video walks through the initial setup process for the radio controller.
Video 11.4: Radiomaster Boxer Crush Advanced Functions (2:12). This video explores more advanced settings and capabilities of the radio controller.
Video 11.5: Radiomaster Boxer Crush Quick Start Guide (0:29). A concise video providing essential steps to get started with the radio controller.
Video 11.6: Radiomaster Boxer Crush Binding Process (1:08). This video demonstrates how to bind the Boxer Crush transmitter to a compatible receiver.