1. Introduction
Thank you for choosing the TWO-WAY Motorcycle 2-Way Alarm System. This system is designed to provide advanced anti-theft protection for your motorcycle, e-bike, scooter, ATV, or UTV. Featuring a 125dB alarm, two-way remote control with vibration and sound alerts, and various functions like remote start and sensitivity adjustment, it ensures enhanced security for your vehicle.

1.1. Safety Information & Warnings
- Do not use in damp environments: Ensure the alarm system components are protected from moisture.
- Inspect before use: Always check the product for any damage before installation or use.
- Keep out of reach of children: Small parts and electronic components can be hazardous.
- Avoid overloading: Do not connect the system to an electrical circuit that exceeds its specified voltage or current limits.
- Do not disassemble: Unauthorized disassembly of components may void warranty and cause malfunction.
2. Key Features
- Bidirectional Alarm: The remote control provides vibration and sound alerts when the main unit triggers an alarm.
- Remote Control Functions: Includes remote start, engine turn off, double flash alert, vehicle search, and sensitivity adjustment.
- Mute Mode: Both the main unit and remote control can be set to mute mode for silent operation.
- Compact Design: Portable remote controls for convenient long-distance operation.
- Universal Compatibility: Suitable for 12V motorcycles, ATVs, UTVs, and electric bikes.
- High-Decibel Alarm: Features a loud 125dB siren to deter thieves.
3. Specifications
| Feature | Detail |
|---|---|
| Model Name | 28739 |
| Input Voltage | 12V |
| Alarm Sound Level | 125dB |
| Material | Plastic, Metal |
| 2-Way Controller Power | 1x AAA battery (not included) |
| Package Weight | 0.296 kg |
| Package Dimensions | 23cm (L) x 18cm (W) x 3cm (H) |

3.1. Package Contents
- 1x Control Host Module
- 1x 125dB Alarm Siren
- 1x Two-way Remote Control
- 1x One-way Remote Control
- 1x Connecting Wire Set
- 1x User Manual

4. Installation and Setup
Before installation, please unpack and verify that all accessories listed in the package contents are present. Follow the step-by-step instructions carefully. Only power on the system after confirming correct assembly and connection.
4.1. Wiring Diagram (Main Unit)

Connection Details:
- Yellow wires: Connect to Turn Signal Lights (two separate connections).
- White wires: Connect to Alarm Horn (two separate connections).
- Black wire: Connect to Cathode (Ground).
- Red wire: Connect to Anode (+12V Power).
- Orange wire: Connect to Lock Switch Output +12V.
- Blue wire: Connect to Starter Output Line.
- Grey wire: Connect to Flameout line.
- Pink wire: Connect to Flameout line.
- Green wire: Connect to Antenna.
Important Notes for Wiring:
- This connection diagram is primarily for AC ignition (short circuit, flameout) and "positive voltage start" models.
- If your vehicle uses a "negative start" or "DC ignition" model, special wiring may be required. Please consult a professional or contact customer support.
- The antenna cable should not be wired with other cables or strapped tightly with them to ensure optimal signal reception.
4.2. Module and Siren Placement


Ensure the main control module and siren are mounted securely in a location protected from water and physical damage. The antenna should be positioned to maximize signal range, avoiding obstruction by metal parts.
5. Operation
The system is designed for simple and intuitive operation using the provided remote controls.
5.1. Remote Control Functions


The remote controls feature several buttons for various functions:
- Arm/Lock Button (often a lock icon): Activates the alarm system.
- Disarm/Unlock Button (often an unlock icon): Deactivates the alarm system.
- Remote Start/Engine On Button: Starts the vehicle remotely (if wired for this function).
- Engine Off Button: Turns off the vehicle engine remotely.
- Search Car/Panic Button: Activates the alarm to help locate the vehicle or deter threats.
- Sensitivity Adjustment: Allows modification of the alarm's vibration sensitivity.
Specific Button Functions (refer to your remote for exact icons):
- Short press "⚡" key: Enters mute security status (alarm is armed but silent).
- Long press "⚡" key: Activates the double-flash alert function (turn signals flash).
- "🔔" and "🔑" buttons: May have similar or combined functions depending on the remote model.
5.2. Mute Mode
The main alarm unit can be adjusted to a mute mode, and the remote control also supports a mute mode. This allows for silent arming and disarming, or silent alerts on the remote.
6. Maintenance
- Regular Cleaning: Keep the main unit, siren, and remote controls clean and free from dust and debris. Use a soft, dry cloth.
- Battery Replacement: The 2-way remote control requires 1x AAA battery. Replace the battery when the remote's performance degrades or the low battery indicator appears.
- Avoid Physical Damage: Protect all components from impacts, extreme temperatures, and water exposure.
- No Disassembly: Do not attempt to disassemble any part of the alarm system. This can cause damage and void any potential warranty.
7. Troubleshooting
7.1. Common Issues and Solutions
- Alarm Malfunction: If the alarm system is not functioning as expected, first check all wiring connections to ensure they are secure and correctly installed according to the diagram. Ensure the vehicle's battery is adequately charged.
- Remote Control Not Responding: Check the battery in the remote control and replace it if necessary. Ensure you are within the effective range of the alarm unit.
- Missing Accessories: If any accessories were missing from your package upon arrival, please contact the seller or purchase channel for replacement.
7.2. Advanced Issues
For complex malfunctions or issues that cannot be resolved with the above steps, please contact after-sales service for assistance.
8. User Tips
- Immobilizer Functionality: This alarm system includes immobilizer functions through its "Starter Output Line" and "Flameout line" connections, which can prevent the engine from starting when the alarm is armed.
- Antenna Placement: For optimal remote control range and signal stability, ensure the antenna cable is not bundled with other wires or obstructed by metal components.
- Battery for Remote: Remember that the 2-way remote control requires a single AAA battery, which is not included in the package. Have one ready for immediate use.
9. Warranty and Support
For any product-related inquiries, technical support, or warranty claims, please contact the seller or the official customer service channel where you purchased the product. Provide your purchase details and model number (28739) for faster service.
A detailed user manual in PDF format is available for download here.





