... /Pa Freq. Range: 10 Hz ~ 20 kHz Freq. Response: Free field Polarized Voltage: 0 V Ref. direction: Axial direction of microphone ... 1, disc x 1, instrument manual x 1 Available: Noise Analyser AWA6270+AB, AWA6270+AC, AWA6270+BC, AWA6270+ABC, Sound Level ... , 2 m mic. support rod, SLM tripod, carrying case Frequency analyser AWA 6270+