Compatible M7WP-MIC Waterproof Outdoor Microphone for M7B77-W, M7D77-POE, Any IP Network Camera & PTZ IPCamera with Interface -an IP Camera External Microphone

M7WP-MIC waterproof outdoor Microphone - An IP camera external microphone: Advanced professional environmental sounds digital microphone, pinhole design, and hidden installation. It is high sensitivity, high bandwidth, and noise proof. It covers the listening area of 375 sq ft / 35 square meters. It has been used ear handle removable surface annular rib design, easy to wear tube wall installation. There is built-in digital voice processing circuits and micro-processing chip, 0.8mm pinhole design principle used to accurately calculate of the sound reflection angle. There is automatic suppression of the high-intensity sound, reliable protection for the back-end audio equipment. Integrated professional pre-amplifier, microphone head can directly drive active speakers, hard disk recorders, tape recorders and so on. Listening area 108 sqft - 375 sqft Audio transmission distance 3000 m Frequency response 20Hz ~ 20kHz Sensitivity -47dB Signal to Noise Ratio 50dB (40 dB sound source 1 meter) 30dB (10 meters 40 dB sources) 1KHz at 1 Pa Directivity omnidirectional Dynamic Range 80dB (1KHz at Max dB SPL) Maximum sound pressure 120dB SPL (1KHz, THD 1%) Output impedance 600 ohms non-equilibrium Output signal amplitude 2.5Vpp/-25db Microphone Customized omnidirectional capacitor microphone The ordinary four-core telephone wire, category 5 network twisted pair, and shielded cable can be used. Microphone head has built-in lightning protection, power supply polarity reversal protection. Integrated professional built-in preamplifier circuit, no adapter Transmission cable telephone lines, network twisted pair, shielded cable (complex electromagnetic environment with a shielded cable) Supply voltage DC DC 8V-20V (recommended to use 12V, greater than 500 m recommended 15V) Supply current 17 mA Operating temperature -13F ~ 158F Color Silver Shell Material Metal Dimensions L-2.5in ¡Á D-0.75in Weight 1.8 OZ