1. Introduction
This instruction manual provides detailed information for the proper setup, operation, and maintenance of your HAIBOXING 2.4GHz Radio Controller, model LS103. This transmitter is designed as a spare part for HAIBOXING RC cars, specifically compatible with models 18858, 18859, and 18859A. Please read this manual thoroughly before use to ensure safe and optimal performance.

Image 1.1: Front view of the HAIBOXING 2.4GHz Radio Controller (LS103).
2. Product Features
- Spare Part Number: LS103
- Item Name: Transmitter
- Quantity: 1pcs
- Original spare part, ensuring 100% compatibility and functionality.
- Compatibility: Specifically designed for HBX 18858, 18859, and 18859A RC car models.
3. Package Contents
Please verify that all items are present and in good condition upon opening the package:
- 1 x HAIBOXING 2.4GHz Radio Controller (LS103)
- 1 x Instruction Manual (this document)
4. Setup
4.1 Battery Installation
The LS103 transmitter requires 3 AA batteries (not included) for operation. Follow these steps to install the batteries:
- Locate the battery compartment cover on the bottom of the transmitter handle.
- Press the tab and slide the cover downwards to open the compartment.
- Insert 3 AA batteries, ensuring the correct polarity (+/-) as indicated inside the compartment.
- Slide the battery compartment cover back into place until it clicks securely.

Image 4.1: View of the battery compartment on the HAIBOXING Radio Controller.
4.2 Binding/Pairing with RC Car
To establish communication between the transmitter and your RC car, a binding process is required. Refer to your specific HBX RC car model's manual (18858, 18859, or 18859A) for detailed binding instructions, as the procedure may vary slightly per receiver. Generally, the steps involve:
- Ensure both the transmitter and the RC car's receiver are powered off.
- Turn on the RC car's receiver (or connect its battery). The receiver's LED should blink, indicating it's in binding mode.
- While holding the bind button (if present on the transmitter, otherwise just power on), turn on the transmitter.
- The LED on both the transmitter and receiver should become solid, indicating a successful bind.
- Turn off both devices and then turn them on again in sequence (transmitter first, then car) to confirm the bind.
5. Operating Instructions
5.1 Controls Overview
Familiarize yourself with the main controls of the LS103 transmitter:
- Steering Wheel: Controls the left and right steering of the RC car. Turn clockwise for right, counter-clockwise for left.
- Throttle Trigger: Pull the trigger towards you to accelerate forward. Push the trigger away from you to brake or reverse.
- ON/OFF Switch: Powers the transmitter on or off.
- Steering Trim Dial: Adjusts the neutral position of the steering. If the car pulls to one side when the steering wheel is centered, use this dial to correct it.
- Throttle Trim Dial: Adjusts the neutral position of the throttle. If the car moves slightly forward or backward when the throttle trigger is released, use this dial to correct it.
- D/R (Dual Rate) Dial: Adjusts the maximum steering angle. Turning it down reduces the sensitivity of the steering.

Image 5.1: Side view of the HAIBOXING Radio Controller, showing the ON/OFF switch and trim dials.
5.2 Advanced Settings Switches
On the bottom side of the transmitter, you will find two switches for advanced control adjustments:
- SLOW/NORMAL Switch: This switch controls the maximum speed output of the RC car. Set to 'SLOW' for beginners or indoor use, and 'NORMAL' for full speed and outdoor use.
- STEERING REV./NORMAL Switch: This switch reverses the direction of the steering servo. If the car steers right when you turn the wheel left, flip this switch to 'REV.' to correct the steering direction.

Image 5.2: Bottom view of the HAIBOXING Radio Controller, highlighting the SLOW/NORMAL and STEERING REV. switches.
6. Maintenance
Proper maintenance will extend the lifespan of your radio controller:
- Cleaning: Use a soft, dry cloth to wipe down the transmitter. Avoid using harsh chemicals or solvents.
- Storage: Store the transmitter in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: Remove batteries from the transmitter if it will not be used for an extended period to prevent leakage and damage.
- Avoid Moisture: Do not expose the transmitter to water or high humidity, as this can damage internal electronics.
7. Troubleshooting
If you encounter issues with your HAIBOXING Radio Controller, refer to the table below for common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Transmitter does not power on. | Batteries are dead or incorrectly installed. | Replace batteries with new ones, ensuring correct polarity. |
| RC car does not respond to transmitter. | Not bound, out of range, or car battery low. | Perform binding procedure (Section 4.2). Ensure car battery is charged. Move closer to the RC car. |
| Steering is reversed. | STEERING REV. switch is in the wrong position. | Flip the STEERING REV. switch (Section 5.2). |
| Car pulls to one side when steering wheel is centered. | Steering trim needs adjustment. | Adjust the Steering Trim Dial (Section 5.1). |
| Car moves slightly when throttle trigger is released. | Throttle trim needs adjustment. | Adjust the Throttle Trim Dial (Section 5.1). |
8. Specifications
Key specifications for the HAIBOXING 2.4GHz Radio Controller (LS103):
| Attribute | Value |
|---|---|
| Item Model Number | LS103 |
| Item Weight | 4.2 ounces |
| Package Dimensions | 9.37 x 5.31 x 3.11 inches |
| Manufacturer | Shantou Haiboxing Technology&Education Model Co., Ltd. |
9. Warranty and Support
For warranty information, technical support, or replacement parts, please contact HAIBOXING customer service or visit the official HAIBOXING website. Keep your purchase receipt as proof of purchase for any warranty claims.
You can find more information and contact details on the HAIBOXING store page: HAIBOXING Store




