The Tufftalk M is compatible with a wide variety of hard hats on the market. Included in the package for the Tufftalk M are two adapters (Type A and Type B) so that the ear muffs can fit into most helmets. If the Type A Hard Hat Adapter that comes attached to the Tufftalk M do not fit in the left and right slots on the hard hat then replace them with the Type B Hard Hat Adapters.
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