First, I assume Cardo is able to connect to 3rd party headset / intercom. The last I read some 3-4 years ago, it can. Do read up yourself to confirm.

Secondly, get a cheap intercom that is friendly to connect to other intercom. Maxto is on my list for this. Cheap Maxto M2 or M2C will do.

When connected between 2 different brands, it's usually 1:1 only.

Best add-on to my riding PPE (Personal Protection Equipment)!!

Acquired a new Shure SE215 from warehouse sales, came with lightning connector.

Then I added a bluetooth connector and a 3.5mm connector that will go with my helmet intercom.

While I haven't plugged into the helmet intercom, I tried it on with my helmet.

The flushed profile and over ear cable ensured the ear bud sits tightly in place when I put on and take out my full face helmet.

It also mute out unwanted road and wind noise.

While the bud is in my ear, I can still hear voice from my GPS broadcasted through speakers of my helmet intercom.

Love it.

Next I am gonna swap in a 3.5mm connector to my helmet intercom, connect to the Shure using 3.5mm while using mic that's fixed to my helmet.


Earbud with 3 different sets of wiring.


Flush fit in ear.


wire loop over ear kept it in place when I put on helmet.

Haven't tried t2plus so no comment and unable to compare to m2c.