With an advanced digital circuity the Xcel 100 can produce four listening modes: Universal Speech clarity mode Hi frequency Power boost. The wind noise reduction is perfect for those windy days on the range. - Active Dynamic Sound Suppression - Hi Gain Omni Directional Mics - Wind Noise Reduction - Voice Mode Navigation - Auto shut off 2/4/6 hours - Controls moved to headband - Less holes in the muff cups to improve NRR - New ergonomic head band design - Rubber bumpers on lower cup - Low battery warning