Champion 40978: Introducing the Champion Vanquish Electronic Hearing Protection, meticulously engineered for the demands of shooting sports. Each ear muff has been acoustically tailored based on gunshot noise patterns, striking the perfect balance between prolonged comfort and superior noise reduction. The Safe Level Sound Compression Technology, with an impressive refresh time of less than 1 millisecond, enables active noise cancellation. Two Full Dynamic Range HD speakers render sounds with utmost clarity. The omnidirectional microphones capture ambient sounds, offering a realistic auditory experience whilst efficiently reducing wind noises. These Bluetooth-compatible ear muffs also provide functionalities to make and receive phone calls. The device guarantees durability with a 12-Hour Runtime made possible by the included Lithium Ion Rechargeable Batteries. It is also programmed to automatically shut off after three hours, preserving battery life.