These Enhancement Earbuds from Walker's are created to protect your hearing when shooting and training. Features of the Walker's Rope Hearing Enhancer: - Battery: Rechargeable (cable); - Noise Reduction Rating: 29DB; - Sound activated compression; - High / low compression mode; - 3 pairs of foam tips (S/M/L); - Omni-directional microphones. You can wear the Enhancers around your neck; they have a flexible rubber cord and are lightweight enough to be worn all-day long. Hi-gain omnidirectional microphones provide clear sound enhancement and a noise reduction rating of 29 DB. These earbuds from Walker's are fully rechargeable by the cable and feature LI-ON Battery; they can hold the battery up to 10 hours straight. The Enhancers come with a 12 inch USB charging cable, EVA storage case, 3 pairs of foam tips that will fit your ears perfectly and ready out of the box.