Walker’s Innovative XCEL Series Ear Protection Was Inspired By Taking An Unconventional Approach To Engineering. The XCEL’S Patent-Pending Design Moves The Digital Control Panel And Microphones Off The Muff Cup To The Headband, Which Delivers A Slimmer Profile Depth To Protection Ratio. New Walker’s XCEL Muff Series also includes four listening modes: Universal, Speech Clarity Mode, Hi Frequency, and Power Boost. The New ergonomic headband design for maximum comfort every time. Features Hi Gain Omni Directional Mics with Active Dynamic Sound Suppression and Wind Noise Reduction! And how about that FDE color? We love these muffs!