Feature: 1. Surveillance pickup has strong anti‑interference, and has the advantages of pure sound quality and powerful action. 2. Surveillance pickup has exquisite round appearance, precise craftsmanship and materials help restore high‑fidelity sound quality and make the sound even. 3. The Audio Sound monitor kit microphone is high sensitivity and high fidelity performance. 4. The microphone and air directly butt, omni‑directional pickup, high sensitivity. 5. High quality wire, low power consumption, long transmission distance, durable, stable and safe.(pickup area,5㎡~ 10㎡) Specification: Item Type: Pickup Material: Aluminum alloy Use Place and Area: Tax bureau, service hall and other office windows (5-10㎡) Signal Transmission Distance: Approx. 1000m/3280.8ft Frequency Response: 150Hz - 12kHz Pointing Characteristic: Interface pointing Connection Method: 3-wire system (red: positive power supply, black: common ground GND, white: audio positive) Transmission Cable: RVVP3 x 1.5mm² Power Supply Voltage: DC9-18V . Package List: 1 x Pickup1 x English Manual