The SMART HJC 21B is the 2nd Generation Standard Bluetooth Communication System model that supports 21B compatible HJC helmets, with structural interfaces that users can easily mount on HJC helmets.
Based on the BT 5.1 low power system, the 21B offers Bluetooth 4-way intercom functionality, with over 22 hours of talk time.
The enhanced sound provides users with an HD speaker, to enrich mid-to low-pitched sounds.
The SMART HJC 2ndgeneration premium Bluetooth communication system models implement an all-in-one design, that is fully integrated into the helmet, allowing you to feel the optimal weight balance and aerodynamic performance while riding. The SMART HJC 50B and 21B can be installed on RPHA 71, RPHA 91, RPHA 31, or i71.
Co-developed with SENA and tailored specially for HJC helmets.
Fits the following HJC models
RPHA 2nd Gen Series: RPHA 31/ RPHA 71/ RPHA 91
FULL FACE: i71