100 Digital Electronic Muff W/ Voice Clarity Advanced Circuit 4 Listening Modes. New Walker’s XCEL Muff Series also includes four listening modes: Universal, Speech Clarity Mode, Hi Frequency, and Power Boost. New ergonomic headband design for maximum comfort every time. Hi Gain Omni Directional Mics with Active Dynamic Sound Suppression and Wind Noise Reduction. Controls moved to headband resulting in less holes in ear cups and improving NRR. Powered by 2 (AAA) batteries -included. Customer Service and Feedback. Your feedback very important to us, after you get your package and you are. Satisfied with our service. If you have any problem with your order / any questions please before leave any type of feedback. Please don’t send two messages with the same content to avoid delays in response. Thank you for shopping at our store.