Bluetooth(R) connectivity; Integrated communication microphone; Ultra low-profile earcups; Rubberized coating; 4 hi gain omnidirectional microphones; Audio input jack; Low noise/frequency tuned for natural sound clarity; Lab noise reduction rating: 23 dB; Sound-dampening composite housing; Sound activated compression–.02-sec reaction time; Recessed volume control knobs; Comfortable headband with metal wire frame; External battery door; Compact, folding design; Includes 2 AAA batteries;