HJC 21B Smart Intercom Applicable for RPHA 2nd Gen Series: RPHA 31/ RPHA 71/ RPHA 91 and full face: i71 Call answering and hang-up functions Long-lasting power (Up to 13 hours) Battery Unit and PCB unit Boom-type which is applicable for modular and JET helmets Wire-type for full-face helmets Bluetooth 5.1 Advanced noise control Intercom 1,600 m Voice...
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Last checked10 Jun 2026
CategoryMotorcycle Accessories
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HJC 21B Smart Intercom Applicable for RPHA 2nd Gen Series: RPHA 31/ RPHA 71/ RPHA 91 and full face: i71 Call answering and hang-up functions Long-lasting power (Up to 13 hours) Battery Unit and PCB unit Boom-type which is applicable for modular and JET helmets Wire-type for full-face helmets Bluetooth 5.1 Advanced noise control Intercom 1,600 m Voice prompt Universal intercom HD speakers Audio multitasking 4-way intercom 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 speak
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HJC has been designing and manufacturing high quality protective helmets since the early 1950s. In 1971 the factory turned all of its attention to motorcycle helmets and set itself the simple goal of providing high-quality, comfortable and reasonably priced helmets to motorcyclists across the world. This goal came a step nearer during the 1990s when HJC became America's top-selling motorcycle helmet brand - a position it's held ever since. Today HJC helmets are available in every corner of the globe and it's now the world's biggest helmet brand, producing more motorcycle helmets than any other marque. The range now encompasses the full spectrum of helmet types, with the widest selection of graphics, materials, and price points.
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