# SENA SMART HJC 20B UNIT

-   Bluetooth 4.1 Based on Sena 20S EVO Technology: The SMART HJC 20B is the first-generation premium HJC communication system, equivalent to the Sena 20S EVO platform.
-   Universal 4-Way Intercom up to 2 km: Connects with up to 4 riders simultaneously with an intercom range of up to 2 km (1.2 miles) in open terrain.
-   Advanced Noise Control: Wind and road noise suppression technology keeps communication clear at highway speeds.
-   FM Radio and Smartphone Streaming: Built-in FM tuner plus Bluetooth music streaming and turn-by-turn GPS audio integration.
-   Long Battery Life: Extended battery performance for all-day riding with reliable intercom connectivity.
-   Compatible HJC Helmets: Designed to integrate with select HJC helmet models. Co-developed by Sena and HJC for proper fit and optimized communication performance.

The SMART HJC 20B was the first-generation premium communication system developed by the Sena-HJC partnership — and it remains a capable, well-integrated option for riders with compatible HJC helmets. Based on the proven Sena 20S EVO communication platform, the 20B supports 4-way intercom up to 2 km range and integrates seamlessly into compatible HJC helmet interiors without external clamps or visible hardware. Advanced Noise Control keeps communication clear at speed, FM radio and Bluetooth music streaming are both built-in, and battery life covers a full riding day. For HJC riders who want integrated communication that looks as good as it works, the SMART HJC 20B delivers honest Sena-quality performance in an HJC-native package. At The Helmet Shop, we stock the full SMART HJC communication lineup. Backed by Sena's warranty.

### You may also like

-   [SENA SMART HJC 20B UNIT BLACK](/products/hh-smart-hjc-20b-unit-black)
-   [CARDO NEO/CUSTOM 2ND HLMT KIT JBL](/products/hh-neo-custom-2nd-hlmt-kit-jbl)
-   [SENA 30K HD Bluetooth Communication System](/products/30k-hd-bluetooth-communication-system)

## Details

- **Price:** 299.99 USD
- **Vendor:** SENA
- **Type:** Accessories - Bluetooth
- **Tags:** Bluetooth Headsets

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Black | 299.99 USD | In stock |

## Images

- SENA SMART HJC 20B UNIT

---

> Source: [The Helmet Shop](https://helmetshop.com/products/smart-hjc-20b-unit)
> Updated: 2026-06-03