Walker's Razor Tacti-Grip Series Electronic Earmuffs - "Tacti-Grip" high performance silicone composite headband ensures a slip free, secure fit. Full dynamic range HD speakers offer clear balanced sound. Advanced Digital Circuit Bluetooth Enabled Cool Mesh Headband Comfort Gel Earpads Active Dynamic Sound Suppression Hi Gain Omni Directional Mics Clear Digital Sound Lightning Fast Reaction Time Wind Noise Reduction Auto Shut Off 4 Hours Ultra Low Profile Design Rubberized Coating Audio Input Jack Compact Folding Design Comfort Headband With Metal Wire Frame Sound Dampening Composite Housing NRR 23