Advanced digital circuitry. Active dynamic sound suppression. High-gain omnidirectional microphones. 4 listening modes: universal, speech clarity mode, high frequency and power boost. Wind noise reduction. Voice-mode navigation. Auto shutoff for 2/4/6 hours. Controls on headband. Less holes in muff cups improve NRR. Ergonomic headband design. Rubber bumpers on lower cup. Low battery warning. NRR 26. Includes manual and 2 AAA batteries.