Operating Voltage : DC 9V
Max. Current Consumption : 500mA
Primary (inside) / Secondary (Outside) Sound Box : 2W/2W 100Hz-15kHz
Outside Mic Sensitivity : -48dB+/-2dB (0dB=1V/Pa at 1kHz)
Outside Mic Frequency Response : 20Hz-20kHz
Inside Mic Sensitivity : -44dB+/-2dB (0dB=1V/Pa 1kHz)
Inside Mic Frequency Response : 20Hz-16kHz
Dimensions :
Primary Sound Box : 15 x 1 1.6 x 3.9cm (5.9 x 4.5 x 1.5 in)
Secondary Sound Box : 9.1 x 7.7 x 2.3cm (3.5 x 3.0 x 0.9 in)

Host computer
Outside amplifier
Outside microphone
Desktop microphone
Power supply adapter