Motorola RMN4051, 2-Way Hard-Hat Mount Headset, Black - Noise Reduction Rating = 22dB (requires adapter cable RKN4094), Ideal for two-way communication in high-noise environments. mounts easily to hardhats with slots, or can be worn alone. Easily replaceable ear seals are filled with a liquid and foam combination to provide excellent sealing and comfort. 3-foot coiled cord assembly included. Hardhat is not included.
Motorola RKN4094 Adapter Cable Sold Separately