Advanced digital circuitry; Bluetooth(R) connectivity; Variable dynamic sound suppression; High-gain omnidirectional microphones; 4 listening modes: universal, speech clarity mode, high frequency and power boost; Voice-mode navigation; Wind noise reduction; Auto shutoff; Controls on headband; Less holes in muff cups improve NRR; Ergonomic head band design; Rubber bumpers on lower cup; Low battery warning; Lab noise reduction rating: 26 dB; Includes manual and 2 AAA batteries;