Introduction
The Sena SC-A0318 Helmet Communication System is designed to enhance your riding experience by providing seamless communication and audio features within your helmet. This manual will guide you through the setup, operation, and maintenance of your device.
Package Contents
The Sena SC-A0318 Helmet Communication System package includes the following components:
- Main Unit (Sena SC-A0318)
- Helmet Clamp Kit
- Attachable Boom Microphone
- Wired Microphone
- Speakers (integrated with clamp kit)
- Hook and Loop Fasteners for speakers and microphones
- Allen Wrench for clamp installation
- USB Charging Cable

Image: All components included in the Sena SC-A0318 Helmet Communication System package.
Setup and Installation
1. Installing the Helmet Clamp Unit
The helmet clamp unit is essential for mounting the Sena SC-A0318 to your helmet.
- Loosen the screws on the helmet clamp using the provided Allen wrench.
- Slide the clamp between the helmet shell and the inner padding on the left side of your helmet. Ensure it is securely positioned.
- Tighten the screws on the clamp to firmly secure it to the helmet.
- Connect the main unit to the clamp. It should click into place.
2. Installing Speakers and Microphone
The Sena SC-A0318 includes speakers and microphone options for clear audio.
- Remove the cheek pads from your helmet to access the speaker pockets.
- Attach the hook and loop fasteners to the back of the speakers.
- Place the speakers into the helmet's speaker pockets, ensuring they are centered over your ears. Route the speaker wires neatly under the helmet padding.
- Choose your preferred microphone:
- Boom Microphone: Ideal for open-face or modular helmets. Attach the boom microphone to the helmet clamp and position it near your mouth.
- Wired Microphone: Suitable for full-face helmets. Attach the wired microphone to the helmet interior, ensuring it is close to your mouth but not obstructing your vision.
- Reinstall the helmet's cheek pads and ensure all wires are tucked away securely.
Operating Instructions
Powering On/Off
To power on the Sena SC-A0318, press and hold the Jog Dial and the Phone Button simultaneously until you hear "Hello".
To power off, press and hold the Jog Dial and the Phone Button simultaneously until you hear "Goodbye".
Volume Control
Rotate the Jog Dial clockwise to increase the volume.
Rotate the Jog Dial counter-clockwise to decrease the volume.
Bluetooth Intercom Pairing
The Sena SC-A0318 supports 4-way Bluetooth intercom with a working distance of up to 900 meters (0.6 miles) in open terrain.
- Ensure all Sena units are powered on.
- On each unit, press and hold the Jog Dial until you hear "Intercom Pairing" and see red flashing lights.
- On one of the units, press the Jog Dial once. The units will automatically connect.
Phone Pairing
To pair your Sena SC-A0318 with your smartphone:
- Ensure the unit is powered on.
- Press and hold the Phone Button until you hear "Phone Pairing" and see red and blue flashing lights.
- On your smartphone, go to Bluetooth settings and select "Sena SC-A0318" from the list of available devices.
- Once paired, you will hear "Your headset is paired" and the light will change to a blue flashing light.
Making/Receiving Calls & Music
Once paired with your phone, you can:
- Answer a call: Press the Phone Button.
- End a call: Press the Phone Button.
- Play/Pause music: Press the Phone Button.
- Skip track: Rotate the Jog Dial clockwise.
- Previous track: Rotate the Jog Dial counter-clockwise.
Specifications
| Feature | Detail |
|---|---|
| Model | SC-A0318 (843-02001) |
| Item Weight | 5.6 ounces |
| Product Dimensions | 9.3 x 4.1 x 1.6 inches |
| Batteries | 1 Lithium Polymer battery required |
| Intercom Range | Up to 900 meters (0.6 miles) in open terrain |
| Intercom Support | Up to 4 riders |
| Talk Time | Up to 12 hours |
| Charging Time | 2.5 hours |
| Special Features | Advanced Noise Control, Glove-Friendly Jog Dial |
Troubleshooting
No Power
If the unit does not power on, ensure it is fully charged. Connect the unit to a power source using the USB cable and allow it to charge for at least 2.5 hours.
Intercom Disconnection
If intercom connection is lost, ensure all units are within range and re-initiate pairing as described in the "Bluetooth Intercom Pairing" section.
Audio Issues
Check speaker and microphone connections. Ensure speakers are correctly positioned over your ears and the microphone is close to your mouth. Adjust volume using the Jog Dial.
Maintenance and Care
- Keep the unit clean by wiping it with a soft, damp cloth. Avoid using harsh chemicals or solvents.
- Ensure the USB charging port cover is securely closed when not charging to prevent dust and moisture ingress.
- Store the unit in a cool, dry place when not in use.
- Regularly check for firmware updates via the Sena Device Manager to ensure optimal performance and access to new features.
Warranty and Support
For warranty information and technical support, please refer to the official Sena website or contact your local dealer. Keep your proof of purchase for warranty claims.
Online resources and FAQs are available at www.sena.com.





