This is a waterproof directional monitoring , a professional outdoor intercom microphone used for close range sound pickup outdoors. It is waterproof, moisture-proof, dustproof, explosion-proof, and has excellent sound quality. Using a professional directional condenser microphone , clear pickup within 5 meters at close range. Directional design can effectively prevent interference from highways, shopping malls, and pedestrian noise. The built-in low-frequency noise filtering function greatly improves speech clarity. Adopting chip noise treatment and waterproof microphone , it is not afraid of water or immersion, reaching IP67 waterproof level, and can be used for underwater work up to 2 meters. The pickup is equipped with anti-thunder protection, power polarity reversal protection, and power protection modules. Widely applicable to various outdoor sound pickup occasions, such as toll stations, train stations, buses, etc Size: 36MM (Diameter) x 43MM (H) Installation method: bolt installation Wiring length: 80CM Waterproof level: IP67 outdoor waterproof Pick up distance: 30 square meters Audio mission distance: 3000 meters Frequency response: 20-20K Hz Sensitivity: -48dB Directional feature: Full directional Signal to noise ratio: 80dB Dynamic range: 100dB Maximum withstand sound pressure: 120dB Output impedance: 600 unbalanced Number of microphones: single microphone Scope of application: Post booths, toll booths, outdoor intercoms, etc Circuit protection: anti-thunder protection, power polarity reversal protection Connection method: Power cord DC12V (red), audio cable AOUT (yellow), ground wire GND (black) mission cable: 3x0.5MM2 RVVP shielded cable Working voltage: DC stabilized voltage DC12V Working environment temperature: -25 -70 Weight: Approximately 81 grams Colour:Silver Material:Metal Note: Any BNC, connectors, or power supplies are not included. Package Contents: 1 * Audio Pickup Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.