· EXCELLENT NOISE REDUCTION RATING: 26db
· DUAL(DIFFERENTIAL)VOLUME CONTROLS
· PRE AMPLIFIER WITH SELECTIVE FILTER
· NOISE CANCELING ELECTRET MIC.W/MUFF
· Weight: 13~14 ounces
· MICROPHONE RANGE : 300-8,000HZ SOURCE OHMS : 220-2,200
· SPEAKER RANGE :20-17,000HZ
