ISOtunes Sport DEFY Shooting Earmuffs: Rechargeable Bluetooth Hearing Protection. TACTICAL SOUND CONTROL: Block impact noise with audio passthrough technology. TSC enables conversation and environmental awareness while suppressing percussive noises from gun ranges or other hunting and shooting related activities. Features passive noise isolation of 25 dB noise reduction rate (NRR). ALL DAY BATTERY: ISOtunes Sport DEFY Features a rechargeable lithium-ion battery with up to 11 hours of battery life on a full charge. The included rechargeable battery pack can also be replaced with 3 AAA batteries to receive up to 22 hours of battery life. Uses Bluetooth 4.2 technology. CLEAR CALLS AT THE RANGE: Signature noise suppressing microphone with echo cancellation technology help block percussive noise from firearms, air compressors, or hammers for clear calls in loud environments. BUILT TO LAST: ISOtunes Sport DEFY features IPX4 sweat and water resistance to ensure that your hearing protection holds up in any conditions. With durable construction, DEFY is ready for any challenge. ISOtunes Sport DEFY Shooting Earmuffs: Bluetooth Hearing Protection With Tactical Sound Control Over-ear noise isolation designed for comfort and convenience with ISOtune’s focus on quality and safety in Sport, Hunting, and Shooting. Specifically designed to protect against percussive noises, Tactical Sound Control (TSC) features passthrough audio, allowing you to communicate and have awareness of your surroundings while suppressing loud percussive noises such as gunshots or other impact noises. Our signature SafeMax technology limits audio volume to a safe 85 dB maximum, to protect your hearing while shooting. ISOtunes Sport DEFY ensures your ears are always protected. All Day Battery Life: ISOtunes Sport DEFY includes a rechargeable lithium ion battery that provides up to 11 hours of tactical sound control and/or listening time. Replace the rechargeable battery with 3 AAA batteries for up to 22 hours of additional life. Wireless Connectivity: Easily connect to your preferred listening device with Bluetooth 4.2 connectivity and listen to your favorite tunes while blocking out the sounds at the range. ISOtunes Sport DEFY are also antenna free, providing you with a more compact and durable earmuff. Built for drops, spills, and sweat, ISOtunes are designed for the toughest environments. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. We usually respond within 24 hours on weekdays. Thank you for shopping at our store.