Sena SRL-EXT Mesh Bluetooth System - Suits Shoei NXR2
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Description
Description
The Sena SRL-EXT is a helmet-integrated Bluetooth and Mesh intercom system built exclusively for the Shoei NXR2. It slots into the helmet's dedicated communication pockets for a clean installation with no external clamps or brackets required.
Combining Sena's Mesh Intercom technology with Bluetooth connectivity, the SRL-EXT lets riders communicate across a group, take phone calls, stream audio, and receive GPS directions — all through one tidy, helmet-native unit. It suits touring and sport-touring riders who want full-featured communication without compromising the fit or profile of their helmet.
Key Features
Key Features
- Designed exclusively for the Shoei NXR2 helmet with tool-free, factory-fit installation
- Sena Mesh Intercom technology supporting Open Mesh and Group Mesh modes
- Bluetooth 5.0 for phone calls, music streaming and GPS audio
- Integrates into the NXR2's dedicated speaker pockets — no external housing or mounting hardware
- Helmet-specific speaker and microphone placement for optimised in-helmet audio
- Firmware updatable via Sena Device Manager
What's in the Box
What's in the Box
- SRL-EXT communication unit
- Helmet-specific speakers
- Wired microphone
- USB-C charging cable
- Quick start guide
Specifications
Specifications
| Brand | Sena |
|---|---|
| Model | SRL-EXT |
| Helmet Compatibility | Shoei NXR2 |
| Bluetooth Version | 5.0 |
| Mesh Technology | Sena Mesh Intercom 2.0 |
| Mesh Modes | Open Mesh; Group Mesh |
| Charging Port | USB-C |
Operations & maintenance
Operations & maintenance
Place the speakers into the NXR2's designated speaker pockets as directed in the quick start guide — no tools are required.
Route the cables through the helmet lining before refitting the interior padding to ensure a secure, rattle-free installation.
Charge the unit fully before first use via the USB-C port.
Install the Sena Device Manager (desktop) or Sena Utility App (mobile) to check for and apply firmware updates, which can improve performance and compatibility.
To clean, wipe the exterior of the unit with a soft, lightly dampened cloth; never use solvents, alcohol-based sprays or direct water streams on the unit or connectors.
Avoid directing compressed air at microphone or speaker openings.
If the helmet will not be used for an extended period, store the SRL-EXT charged to a partial level rather than fully discharged to preserve battery health.
Store the helmet and unit in a cool, dry location away from direct sunlight and heat sources.
For reliable Mesh Intercom group sessions, ensure all riders in the group are running the same firmware version.

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Sound quality is amazing, fitment is straightforward and makes the ride great