These are new. Stihl calls it their dynamic bt. It's designed for outdoor work in noisy areas. The Bluetooth headset connects to your phone. You can... | By Steel Toe University | Facebook
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ISOtunes LINK 2.0 Bluetooth Earmuff Hearing Protector, 25 dB Noise Reduction Rating, OSHA Compliant Ear Protection Headphones IT-48 - The Home Depot
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