Ultra Low Profile Ear Cups Rubberized Coating Two Hi Gain Omni Directional Microphones Audio Input Jack Low Noise / Frequency tuned for natural sound clarity Volume Control Compact Folding Design Comfort headband w/ metal wire frame Sound dampening composite housing NRR 23 Sound Activated Compression – 0.02 second reaction time Recessed Volume Control Knob External Battery Door Operates on 2 “AAA” batteries included