Champion Traps and Targets Vanquish Pro Elite Electronic Hearing Protection Earmuffs Gray . Each muff was acoustically modeled ongunshot reports to achieve the optimal balance of all day comfort and noisereduction. They all feature Safe Level Sound Compression Technology with arefresh time 1ms. Two Full Dynamic Range HD speakers ensure everythingyou hear is crystal clear. Omnidirectional microphones pick up everythingaround you giving a natural sound while minimizing wind noises. Thismodel is Bluetooth-enabled and has the ability to take and receive phone calls. This Elite model also takes technology to the next level by incorporating rechargeable lithium-ion batteries (12-hour runtime) and active noise cancellation making sure unwanted ambient noises are eliminated.Features:Safe Level Sound Compression Technology Acoustic Foam for All Day Comfort Sound Refresh Time 2 Full Dynamic Range High Definition Speakers 5 Omnidirectional Microphones 6x Amplification 12-Hour Runtime with Lithium Ion Rechargeable Batteries for Models 40982 and 40983 3 Hour Automatic Shut Off Lithium Ion Rechargeable Batteries Included Specifications for Champion Traps and Targets Vanquish Electronic Pro Elite Hearing Protection: Manufacturer: Champion Traps and Targets Color: Gray NRR: 22 - 23 dB Quantity: 1 Pair Battery Type: Lithium-ion Rechargeable Additional Features: Active Noise Cancellation Bluetooth Condition: New Features: Safe Level Sound Compression Technology Acoustic Foam for All Day Comfort Sound Refresh Time