The Hard Hat Clip-On Headset dual-ear headset provides noise reduction in demanding and high-noise environments where the use of a hard-hat or safety helmet is required. Ideal for applications such as construction, manufacturing, and public works, or anywhere communication is critical. The hard hat headset uses a short dual mini connector for use only with the CrewPlex MR10 pack. This headset attaches to most standard hard hats.This headset has a Noise Reduction Rating of 20 dB.