This Impact Sport Bluetooth Electronic Shooting Earmuff offers superior hearing protection for shooting while keeping you safely connected to environmental sounds. Digital sound compression provides a lightning-fast 0.5 millisecond reaction time (the interval between when a shot is fired and when the earmuff lowers the sound to a safe level). Two high-gain omni-directional microphones deliver 5X sound amplification of low level frequencies. This allows you to hear important commands on the range, and crucial environment sounds when hunting. Integrated Bluetooth technology allows the electronic earmuff to sync with your mobile device for seamless music streaming. The 2 Mbps data speed is twice as fast as Bluetooth 4.2 for higher fidelity audio from your music player. Low profile ear cups ensure proper firearm stock clearance while aiming, and the padded headband is adjustable for a comfortable, customized fit. The rechargeable lithium ion battery delivers long-lasting performance. All electronic shooting earmuffs and safety eyewear are compatible for use with each other. 0.5 MILLISECOND REACTION TIME: Extremely fast.