Now with Bluetooth 5.0 technology and an even faster reaction time of .5 milliseconds, Impact Sport's intelligent electronic ear protection is always actively listening. Employing integrated omni-directional microphones that amplify ambient sounds, you'll hear only the most important commands on the range and crucial environmental sounds when hunting. When loud, harmful sounds, like firearm discharges, exceed 82dB, the amplification automatically stops, keeping your hearing protected. Features: 21 dB Noise Reduction Rating (NRR) Faster Sound Activated Compression: 0.5 Millisecond Reaction Time BluetoothA(R) Sync to wireless devices Easy to use BluetoothA(R) controls integrated into the headset Digital compression circuitry with 5X Sound Amplification Separate Volume Controls for BluetoothA(R) and external environment amplification 2-High Gain Omni Directional Microphones Features AIR FLOW CONTROL that allows for a slim low profile ear cup design ensuring firearm stock clearance Compact folding design for convenient storage Automatic shut off engages after 4-hours to conserve battery life Rechargeable Lithium-Ion Battery USBC Recharging Cable Adjustable headband now available in two different sizes for a more custom, secure fit