The difference between the 2 clamp kits are the microphones and which helmet they are compatible with. The SMH10-10 has a single fixed boom microphone and can be used with full face, open face, and certain modular helmets. The SMH10-11 has 2 different types of microphones, the wired microphone and the wired boom microphone, and can be used with full face, open face, and modular helmets.
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