RadioMaster Boxer 2.4GHz Remote Control System

Product Overview

Thank you for purchasing the RadioMaster Boxer 2.4GHz remote control system. This system is versatile and suitable for beginners and professionals alike. To ensure correct and safe usage, please read this manual carefully before operation. Due to continuous improvements in software and hardware, this manual may be updated without notice.

The Boxer remote control is compatible with various aircraft types, including fixed-wing, gliders, helicopters, cars, boats, robotics, and multi-rotor aircraft. If you can build it, RadioMaster can control it.

The Boxer utilizes the powerful EdgeTX operating system. For more information, please visit the provided links.

— The RadioMaster Team

Safety Information

Many remote-control models are equipped with powerful motors and sharp propellers. Exercise caution when using or maintaining models. Always disconnect power to the model and remove propellers before performing assembly or maintenance.

Do not operate the Boxer remote control system under the following conditions:

• Severe weather or strong windy conditions (rain, hail, snow, storms) or electromagnetic environments.
• Limited visibility.
• Areas with people, property, high-voltage power lines, public roads, vehicles, or animals present.
• When feeling tired, unwell, or under the influence of drugs or alcohol.
• If the remote control or model appears damaged or not working properly.
• Areas with high 2.4GHz interference or where 2.4GHz radio is prohibited.
• When the radio's battery voltage is too low.
• Areas where local regulations prohibit the use of aviation models.

Important Notes

Antenna Installation

Install the provided antenna in the top of the radio BEFORE installing batteries and turning on the system. DO NOT operate the radio without the antenna installed and the internal RF module powered on, as this will damage the internal RF module and void the warranty.

Firmware Updates

The Boxer comes pre-installed with the most stable firmware. Only attempt to update the firmware if you are confident in the process. Incorrect firmware updates may render the remote control inoperable.

Manual & Firmware Download

The Boxer is pre-installed with factory-approved EdgeTX firmware. To download the latest software manual, visit the RadioMaster website:

www.radiomasterrc.com

For further firmware information:

• EdgeTX: www.edgetx.org
• ExpressLRS: www.expresslrs.org
• Multi Protocol Module: www.multi-module.org

Batteries & Charging

The Boxer features a built-in USB-C charging function for 3.7V lithium batteries. The charging circuit is designed for 2x 3.7V Li-ion 18650 or 2x 3.7V Li-Poly batteries (2s 7.4v Lipo battery pack). The nominal battery voltage is 3.7V, with a maximum charged voltage of 4.2V per cell.

DO NOT use LiFE battery packs or 18650 lithium-ion batteries with a nominal voltage of 3.6V and a fully charged voltage of 4.10V, as this may damage the charger or cause a fire.

If using Li-ion cells, ensure they are unprotected and are button-top cells.

Regularly check the battery voltage and condition. Never charge unattended. Always charge in a safe area away from combustible materials. Do not charge if the remote control is wet or damaged. Ensure correct polarity when charging.

RadioMaster is not responsible for any adverse consequences caused by the use or misuse of this product.

Model & Protocol Selection

Multi-protocol Module (CC2500 / 4-in-1)

The Boxer controller includes a 4-in-1 or CC2500 multi-protocol internal RF module, compatible with numerous protocols. Refer to the multi-module website for the latest list of compatible protocols. New protocols are frequently added and may require firmware updates.

SETUP:

• Long press the MDL button to enter model settings.
• On the SETUP page, select MULTI.
• In the sub-options, select the desired protocol. The system will automatically activate the corresponding RF module and deactivate others.
• [BND] (Bind) is used to initiate the binding process.
• [RNG] (Range) button reduces power to 1/30 for testing remote-control distance.

ATTENTION: For 4in1/CC2500 users, your receiver may require frequency tuning. Follow this link:

www.multi-module.org/using-the-module/frequency-tuning

ELRS Version

Boxer ELRS units feature an internal ELRS module. For optimal performance, it is recommended to enable Dynamic Power and use a 500Hz or lower packet rate to extend battery life and minimize heat generation.

BIND INSTRUCTIONS (ELRS):

1. TURN OFF the transmitter.
2. Cycle power to the receiver 3 times; the receiver LED will flash twice, indicating bind mode.
3. TURN ON the transmitter, long press the SYS button, and choose ExpressLRS LUA under the TOOLS menu. Scroll to [Bind] and press enter.
4. The receiver LED should now be solid, indicating a successful bind.

Warranty & Repair

If you encounter any hardware issues with your remote control, please retain your proof of purchase and contact the retailer where you purchased the Boxer. You can also visit the warranty support page:

www.radiomasterrc.com/contact

Product Diagrams & Labels

Radio Layout (Front View)

Main Controls:

• Antenna: Foldable antenna.
• 2.4 GHZ
• Quick Start Guide
• Voltage Range: 6.6-8.4V DC
• S1 Dial: Rotary dial for control.
• Trainer Port: For connecting external training devices.
• SE Latching Switch: 2-position switch.
• SB 3-Position Switch: 3-position toggle switch.
• SA 2-Position Switch: 2-position toggle switch.
• Speaker: For audio feedback.
• Left Gimbal: Control stick.
• Lanyard Loop: For attaching a neck strap.
• SYS Button: System menu button.
• RTN Button: Return button.
• PAGE Button: Navigates through pages.
• TELE Button: Telemetry display button.
• USB-C Data Port: For charging and data transfer.
• S2 Dial: Rotary dial for control.
• Headphone Jack: For audio output.
• SF Momentary Switch: Push-button switch.
• SC 3-Position Switch: 3-position toggle switch.
• SD 2-Position Switch: 2-position toggle switch.
• Power Button: Turns the device on/off.
• 1.5mm HEX: Hexagonal screw access.
• Right Gimbal: Control stick.
• T1-T4 Trim Buttons: Fine adjustment buttons for control surfaces.
• MDL Button: Model selection button.
• Scroll Wheel: For navigating menus.
• LCD Display: 128*64 Monochrome screen.
• USB-C Charger Port: For charging the battery.
• 6 Position Buttons: Navigation/function buttons.

Radio Layout (Back View)

Rear Features:

• Fabric Handle: For carrying.
• 2mm HEX: Hexagonal screw access.
• Module Bay: For external RF modules (if applicable).
• Removable Grips: For customizing ergonomics.
• Battery Bay: Access to the battery compartment.
• SD Card Slot: For firmware updates and model storage.

Gimbals Adjustments

The gimbals offer adjustable tension and travel limits:

• Horizontal Tensioner (Left-Right): Adjust tension CW to increase, CCW to decrease.
• Vertical Tensioner (Up-Down): Adjust tension CW to increase, CCW to decrease.
• Stick Travel Limiter: Adjust CW to increase travel range, CCW to decrease.
• Gimbal Mode: Toggles self-centering. CW disables self-centering, CCW enables it.

Specifications

Compliance Information

FCC Information

This equipment has been tested and found to comply with the limits for Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC ID: 2A337-BOXER-4IN1 2A337-BOXER-ELRS

Antenna Separation Distance: When operating your RadioMaster transmitter, maintain a separation distance of at least 20 cm between your body and the antenna to meet RF exposure safety requirements.

EU Simple Declaration of Conformity

RadioMaster declares that the radio equipment Boxer complies with EU Directive 2014/53/EU.

Manufacturer: ShenZhen RadioMaster Co., Ltd, 4th Floor, Yangtian Building, No. 18 Yangtian Road, Xin'an Street, Baoan District, Shenzhen, Guangdong.

Full text of the declaration of conformity is available at: www.radiomasterrc.com

CE FC logos are present.