Walker's Hearing 500 BT Digital Electronic Muff with Voice Clarity and and Bluetooth Connectivity GWP-XSEM-BT For over 25 years Walker?s has developed innovative solutions for hearing protection & enhancement. The Walker?s line of products are widely considered the industry standard for shooting protection and safety. With the introduction of advanced digital circuitry & nano tech water repellence, Walker's continues to raise the bar. Advanced Digital Circuit Bluetooth Connectivity Active Dynamic Sound Suppression Four Listening Modes Universal Speech Clarity Mode Hi Frequency Power Boost Wind Noise Reduction Voice Mode Navigation Hi Gain Omni Directional Mics Auto Shutoff NRR 26 Voice Mode Navigation Low Battery Warning Powerd by 2 (AAA) batteries included