Built for noisy, demanding environments, either on the job or off. Ideal for tradesmen, landscapers, construction, military, motor sports and other indoor/outdoor recreation or sporting events. Certified Noise Reduction Rating (NRR) of 23db provides protection against outside noise influences that may damage hearing over time. EQ-VOICE technology and Halo 360 mic offer great fidelity for music and clarity for calls. IP64 certified for water/sweat/dust resistance. Three different earbud tips included.