Converting a Cardo Freecom 2X to a 4X

2026-10-11

Earlier this year I bought a Cardo Freecom 2X to install on my bike helmet. It allows me to listen to music, take phone calls, and intercom with 1 other rider. Cardo also sells the Freecom 4X, which allows you to intercom with 4 riders and has voice control. The two models look nearly identical, which made me wonder if it's just a software limitation. I spent some time reverse engineering my 2X model and was able to enable the additional intercom channel! I also created a web app to allow you to do the same.

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