HJC SENA SMART 21B Bluetooth Communication System HJCSENASMART21BUNIT-1
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HJC SENA SMART 21B Bluetooth Communication System

$219.99
Shipping calculated at checkout.

SKU: 0721-1350-00
May Be Available For Pickup

Description

The HJC Smart 21B Bluetooth Communication System is built for riders who want reliable connection without unnecessary complexity. Designed for seamless integration with select HJC helmets, it delivers a clean, low profile fit that maintains comfort and aerodynamics. Powered by Bluetooth 5.1, the system supports four rider intercom communication, making it ideal for small group rides and everyday use. HD speakers provide clear audio with enhanced mid and low tones, while advanced noise control helps reduce wind interference. With long battery life and easy smartphone pairing, the Smart 21B keeps you connected, informed, and focused whether you are commuting, touring, or riding through changing conditions.

  • Connectivity: Bluetooth 5.1
  • Intercom Range: Up to 1600 m in open terrain
  • Intercom Capacity: Up to 4 riders
  • Audio: HD speakers with advanced noise control
  • Battery Life: Up to 22 hours talk time
  • Compatibility: Select HJC helmets with Smart system integration
  • Controls: Smartphone app and onboard button control
  • Additional Features:
    • Audio multitasking for music and intercom
    • Universal Bluetooth pairing with phones and GPS
    • Custom fit integration for clean helmet install
    • Firmware updates via device manager

Reviews and Q&A

FAQs

The Smart 21B supports Bluetooth intercom communication with up to four riders. This makes it ideal for smaller group rides or riding with a passenger while maintaining stable and clear connections.
The system delivers up to 22 hours of talk time on a full charge. This long battery life allows riders to stay connected during full day rides without worrying about frequent recharging.
Yes, the Smart 21B is designed specifically for compatible HJC helmets with built in mounting interfaces. This allows for quick installation and a clean, integrated look without bulky external components.
Yes, the system pairs with smartphones, GPS devices, and other Bluetooth devices. Riders can listen to music, take calls, and receive navigation prompts while riding.
The Smart 21B features HD speakers that enhance mid and low range sound, delivering clearer audio for communication and media. Advanced noise control also helps reduce wind noise for better clarity at speed.