Panasonic SDR-H100 Camcorder External Microphone XM-40 Professional Video & Broadcast Condenser Microphone XM-40 Professional Video & Broadcast Condenser Microphone Includes Fuzzy Windbuster and Foam Windscreen for Noise Control Transducer type: Condenser (unidirectional) - Frequency response: 35  20,000 Hz - Output impedance: 200 Ohms or less Polar pattern: Super Cardioid - Sensitivity: -40dB +/- 1dB / 0dB=1V/Pa, 1kHz Signal to noise ratio: 75dB or more - Power: 9V alkaline or rechargeable battery - Output: Fixed 24 coiled cable with 3.5mm plug