Cardo scala rider twitter page cardo BK-1 Google+ page
Cardo scala rider facebook page
Cardo Systems YouTube Channel
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25-3-2012

“According to the company: The new cardo BK-1 for bike helmets lets up to three cyclists communicate simultaneously using voice-controlled operation up to 1,640 feet (500 meters) apart via any Bluetooth-enabled mobile phone, GPS or MP3 player.”