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;