Mounts sans main modules install a little differently.

I bought the spare bracket along with a Dual set as a Father's Day gift. My husband either rides with me or our son, but not usually both of us at the same time, so we only needed two main modules. I like the system very much, but wish it had a regular boom mic which would situate the phone button to the rear of the helmet rather than the front. It's a little awkward for me. The wiring for the mic will need to be fastened down somehow. All in all, a small price to pay for this device that creates more social time between riding buddies.

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