The Stealth Elite is a unique pair of electronic hearing protection earbuds with attachable Bluetooth lanyard. Each set of Stealth Elites come with two earbuds independently powered by your standard #10 battery, a rechargeable lanyard with Bluetooth capabilities that can connect to your earbuds to play music or talk on the phone, several sizes of foam ear tips to fit with a Noise Reduction Rating (NRR) of 28, and several sizes of silicone tips designed for staying in your ear during physical activities. Features: TYPE: Compact size ear buds UNIT BATTERY: #10 WORKING TIME: 80+ Hours COMPRESSION: Hi/Low DLSC Compression NOISE REDUCTION RATING (NRR): 28 BLUETOOTH CABLE: USB rechargeable WORKING TIME: 10 hours per charge CHARGING TIME: 2 hours BLUETOOTH: CSR Bluetooth 5.0 - Range 10 mCOAXIAL: MMCX Connector CIRCUITS: Hybrid analog/digital circuits WEIGHT: 28 grams LANYARD: Durable, No-tangle Cloth lanyard WARRANTY: 1-Year Warranty AMPLIFICATION: 5X amplification level ISOLATION: Noise isolation microphones WATERPROOF: IPX6 Rating