Introduction
This instruction manual provides essential information for the safe and effective use of your SIGMA Buster 400 front light and Buster RL 80 rear light set. Please read this manual thoroughly before initial use and keep it for future reference. This lighting kit is designed to enhance your visibility and illuminate your path during cycling activities.
Package Contents
Before proceeding with the setup, please ensure all components are present in your package:
- BUSTER 400 Front Light
- BUSTER RL 80 Rear Light
- Mounting Brackets (for both lights)
- USB-C Charging Cable

Figure 1: Contents of the SIGMA Buster 400 / RL 80 Set package, including both lights, their respective mounts, and the USB-C charging cable.
Setup and Installation
Charging the Lights
Both the BUSTER 400 and BUSTER RL 80 lights are equipped with rechargeable batteries. Before first use, fully charge both lights using the provided USB-C cable.
- Connect the USB-C end of the cable to the charging port on the light.
- Connect the USB-A end of the cable to a standard USB power source (e.g., computer, USB wall adapter).
- The battery indicator LEDs will show charging progress. Once fully charged, the LEDs will indicate a full charge.

Figure 2: Both the BUSTER 400 front light and BUSTER RL 80 rear light can be conveniently charged via USB-C.
Mounting the Front Light (BUSTER 400)
The BUSTER 400 front light comes with a flexible silicone mount for handlebar attachment. Optional accessories like a helmet bracket or a Butler adapter are available for alternative mounting positions.
- Handlebar Mount: Secure the silicone strap around your handlebar, ensuring the light is centered and points forward.
- Helmet Bracket (Optional): Attach the helmet bracket to your helmet and then slide the BUSTER 400 onto the bracket.
- Butler Adapter (Optional): Use this adapter to mount the light below your bike computer for a cleaner cockpit setup.

Figure 3: The BUSTER 400 can be mounted on a helmet using an optional helmet bracket for improved visibility from a higher position.

Figure 4: An optional Butler adapter allows for mounting the BUSTER 400 beneath a bike computer, optimizing handlebar space.
Mounting the Rear Light (BUSTER RL 80)
The BUSTER RL 80 rear light also uses a flexible silicone strap for seat post attachment.
- Secure the silicone strap around your seat post, ensuring the light is positioned vertically and clearly visible from the rear.
Operating Instructions
Power On/Off and Mode Selection
Both lights feature a single button for operation.
- Power On: Press and hold the button for approximately 1 second to turn the light on.
- Mode Cycle: Briefly press the button to cycle through the available light modes.
- Power Off: Press and hold the button for approximately 1 second to turn the light off.
- Battery Indicator: A quick single press of the button when the light is off will display the current battery level.
BUSTER 400 Front Light Modes
The BUSTER 400 offers five light modes with varying brightness and runtimes:
- High: 400 lumens, up to 2 hours runtime
- Mid: 200 lumens, up to 4 hours runtime
- Low: 100 lumens, up to 9 hours runtime
- Night Flashing: 300/100 lumens, up to 5 hours runtime
- Day Flashing: 100 lumens, up to 25 hours runtime

Figure 5: Overview of the BUSTER 400 front light's five operational modes and their approximate runtimes.
BUSTER RL 80 Rear Light Modes
The BUSTER RL 80 provides five modes for rear visibility:
- High: 25 lumens, up to 2 hours runtime
- Low: 5 lumens, up to 7 hours runtime
- Day Flashing: 80 lumens, up to 4.5 hours runtime
- Night Flashing: 15 lumens, up to 6.5 hours runtime
- Eco Flashing: 5 lumens, up to 12 hours runtime

Figure 6: Overview of the BUSTER RL 80 rear light's five operational modes and their approximate runtimes.
Maintenance
Cleaning
To maintain optimal performance and appearance, clean your lights regularly.
- Wipe the lights with a soft, damp cloth.
- Do not use abrasive cleaners or solvents, as these can damage the housing or lens.
- Ensure the charging port cover is securely closed to prevent water ingress.
Water Resistance
Both lights are designed to be splash resistant (IPX4 rated), meaning they are protected against splashing water from any direction. They are not intended for submersion.

Figure 7: The SIGMA Buster 400 and RL 80 lights are splash resistant (IPX4), suitable for use in various weather conditions.
Battery Care
- Charge the batteries regularly, even if the lights are not in frequent use, to prolong battery life.
- Avoid completely draining the battery before recharging.
- Store the lights in a cool, dry place when not in use for extended periods.
Troubleshooting
If you encounter issues with your SIGMA Buster lights, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on | Battery is depleted | Charge the light fully using the USB-C cable. |
| Light turns off unexpectedly | Low battery | Recharge the light. |
| Light modes are not cycling | Button malfunction or temporary software glitch | Ensure the button is pressed firmly. Try resetting the light by holding the button for 10 seconds or allowing the battery to fully discharge and then recharge. |
| Charging not working | Faulty cable or power source; dirty charging port | Try a different USB-C cable and power source. Clean the charging port gently. |
If the problem persists after attempting these solutions, please contact SIGMA customer support or your retailer for further assistance.
Specifications
| Feature | Specification |
|---|---|
| Model Number | 19630 |
| Brand | SIGMA |
| Material | Plastic |
| Power Source | Battery Powered (1 Lithium-ion battery included) |
| Weight | 226 Grams (total for set) |
| Water Resistance Level | IPX4 (Splash Resistant) |
| Front Light (BUSTER 400) Lumens | 400 lm (Max) |
| Front Light Beam Range | 120 meters |
| Rear Light (BUSTER RL 80) Lumens | 80 lm (Max) |
| Rear Light Visibility Range | 1500 meters |
| Number of Light Modes | 5 (each light) |
| Charging Port | USB-C |
Warranty and Support
Warranty Information
The SIGMA Buster 400 / RL 80 Set comes with a 2-year warranty for spare parts availability, indicating manufacturer support for product longevity. Please retain your proof of purchase for warranty claims.
Customer Support
For technical assistance, warranty claims, or general inquiries, please contact your retailer or visit the official SIGMA website for support resources and contact information.





