This is a waterproof directional monitoring head, 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 head, 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 imported chip noise treatment and waterproof microphone head, it is not afraid of water spray or immersion, reaching IP67 waterproof level, and can be used for underwater work up to 2 meters. The pickup head 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 transmission 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) Transmission 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, RCA connectors, or power supplies are not included. Package Contents: 1 x 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.