1. Úvod
This manual provides detailed instructions for the installation, operation, and maintenance of your Sena Smart HJC 21B Bluetooth Communication System. Please read this manual thoroughly before using the device to ensure proper functionality and safety. This system is designed to integrate seamlessly with 21B compatible HJC helmets.
2. Konec produktuview a funkce
The Sena Smart HJC 21B is a second-generation Bluetooth communication system engineered for HJC helmets. It offers advanced features for enhanced communication and audio experience while riding.

Image: The Sena Smart HJC 21B communication unit, featuring a sleek black design with a blue indicator light on the left side and large, tactile control buttons for volume and function in the center.
Klíčové vlastnosti:
- Technologie Bluetooth 5.1: Zajišťuje stabilní a efektivní bezdrátové připojení.
- 4cestný interkom: Allows communication with up to four riders simultaneously.
- Prodloužená doba hovoru: Provides over 22 hours of continuous talk time.
- HD reproduktory: Delivers enhanced audio quality, enriching mid-to low-pitched sounds.
- Pokročilé potlačení hluku: Minimizes wind and road noise for clearer communication.
- Univerzální interkom: Compatible with non-Sena Bluetooth systems.
- Multitasking zvuku: Allows simultaneous intercom conversation and music listening.
- Hlasová výzva: Provides audible status updates and guidance.
- Rozsah interkomu: Up to 1600mm (approximately 1 mile) in open terrain.
3. Nastavení a instalace
The Smart HJC 21B system is designed for easy mounting on compatible HJC helmets, utilizing the helmet's structural interfaces.
Kroky instalace:
- Připravte si helmu: Ensure your HJC helmet is a 21B compatible model. Refer to your helmet's manual for specific instructions on preparing it for communication system installation.
- Namontujte hlavní jednotku: Align the Smart HJC 21B main unit with the designated mounting area on the side of your helmet. Secure it firmly according to the helmet's design.
- Instalace reproduktorů: Place the HD speakers into the helmet's ear pockets. Ensure they are positioned directly over your ears for optimal audio quality.
- Umístěte mikrofon: Attach the microphone to the appropriate location inside the helmet, ensuring it is close to your mouth for clear voice pickup while not obstructing your vision or comfort.
- Trasa kabelů: Carefully route all cables within the helmet's padding to prevent tangling and ensure comfort.
- Nabijte zařízení: Before first use, fully charge the Smart HJC 21B using the provided charging cable. The LED indicator will change color to indicate charging status.
Spárování se zařízeními:
- Párování s chytrým telefonem: Power on the device. Enter pairing mode (refer to the operating instructions for specific button presses). On your smartphone, search for Bluetooth devices and select 'Smart HJC 21B'.
- Párování interkomu: For intercom communication, follow the specific pairing instructions in the operating section to connect with other Smart HJC 21B units or universal intercom devices.
4. Návod k obsluze
This section outlines the basic operations of your Sena Smart HJC 21B system.
Zapnutí/vypnutí:
- Zapnutí: Press and hold the main button for approximately 1 second.
- Vypnout: Press and hold the main button for approximately 5 seconds.
Ovládání hlasitosti:
- Zvýšení hlasitosti: Stiskněte tlačítko „+“.
- Snížit hlasitost: Stiskněte tlačítko „-“.
Funkce telefonu:
- Přijmout hovor: Tap the main button.
- Ukončit hovor: Tap the main button during a call.
- Hlasové vytáčení: Press and hold the main button for 3 seconds (if supported by your phone).
Funkce interkomu:
- Spustit/ukončit interkom: Tap the intercom button (specific button may vary, refer to quick start guide).
- Párování interkomu: Follow the pairing instructions in the setup section to connect with other units.
Přehrávání hudby:
- Přehrát/pozastavit: Tap the main button.
- Další skladba: Press the '+' button for 2 seconds.
- Předchozí skladba: Press the '-' button for 2 seconds.
5. Údržba
Proper maintenance ensures the longevity and optimal performance of your communication system.
- Čištění: Použijte měkký, damp cloth to wipe the exterior of the unit. Avoid using harsh chemicals or abrasive cleaners.
- Skladování: Pokud zařízení nepoužíváte, skladujte ho na chladném a suchém místě. Nevystavujte extrémním teplotám.
- Péče o baterie: To maintain battery health, charge the device regularly, even if not used for extended periods. Avoid fully discharging the battery frequently.
- Kontrola kabelů: Periodically check all cables for signs of wear or damage.
6. Řešení problémů
If you encounter issues with your Sena Smart HJC 21B, try the following solutions:
- Bez napájení: Ensure the battery is charged. Connect the device to a power source and check the charging indicator.
- Žádný zvuk/Špatná kvalita zvuku: Check speaker connections. Ensure speakers are correctly positioned in the helmet. Adjust volume levels. If using intercom, ensure units are within range.
- Odpojení Bluetooth: Ensure the device is within range of your paired smartphone or other intercom units. Try re-pairing the devices.
- Zařízení nereaguje: Perform a factory reset if the device becomes unresponsive. Refer to the full user guide on the Sena website for specific reset procedures.
- Problémy s interkomem: Verify that all participating units are powered on, charged, and correctly paired. Ensure no obstacles are blocking the signal.
7. Specifikace
| Funkce | Specifikace |
|---|---|
| Název modelu | Smart HJC 21B Bluetooth Communication System |
| Číslo modelu | 0721-1350-00 |
| Verze Bluetooth | 5.1 |
| Rozsah interkomu | Up to 1600mm (1 mile) in open terrain |
| Max Intercom Connections | 4-cestný |
| Doba hovoru | Více než 22 XNUMX hodin |
| Kontrola hluku | pokročilá regulace hluku |
| Rozměry (produkt) | 10 x 6 x 4 palce |
| Hmotnost (položka) | 15.8 unce |
| UPC | 885465016212 |
| Výrobce | SENA |
8. Bezpečnostní informace
Always prioritize safety while riding. Using communication devices can be a distraction. Ensure you are familiar with local laws and regulations regarding the use of communication systems while operating a motorcycle.
- Úrovně hlasitosti: Avoid listening at excessively high volumes, which can damage your hearing and prevent you from hearing important ambient sounds.
- Rozptýlení: Do not operate the device in a way that distracts you from safe riding. Keep your focus on the road and traffic conditions.
- Kompatibilita s helmou: This system is designed for specific HJC helmets. Ensure your helmet is compatible to guarantee proper fit and function.
- Helmet Safety Standards: While this communication system integrates with helmets, please note that the helmet itself must meet safety standards such as DOT approval and FMVSS 218 certification for legal on-road motorcycle use in the United States.
9. Záruka a podpora
For detailed warranty information and technical support, please refer to the official Sena website or contact Sena customer service directly. Keep your proof of purchase for warranty claims.
Sena Webmísto: www.sena.com





