Description

 Imported special microphones.

 Directional logic dolby surround sound system, imported high-speed voice processing chip, the built-in two level dynamic noise reduction processing system.

 The built-in DTS noise reduction circuit and AGC circuit, signal output is more smooth.

 Voice is pure clear, less noise.

 Apply in judicial authorities, prisons, detention house, bank, test environment.

 Listening range 10-100 square meters.

 Comply with the CE, FCC, ROHS.

Parameter

 Transmission distance: up to 3000 meters

 Frequency response: 20 hz ~ 21 KHZ

 30 db sensitivity: -

 Signal-to-noise ratio: 85 dB 40 dB sound source (1 meter) 50 dB 40 dB sound source (10 meters) 1 KHZ at 1 Pa

 Pointing to the features: full directivity

 Non equilibrium output impedance: 600-1000 ohms

 Output signal amplitude: 2.5 Vpp / 25 db

 Connection mode: the red line for dc 12 v is, black line for the public, white line is for audio.

 Transmission cable: 0.5 mmRVVP 3 core shielded cable, ordinary 4 core telephone lines, five types of network twisted-pair cable

 Power supply voltage: DC regulated power supply DC 12 v

 Supply current: 20 mA

 Ambient temperature: - 30^oC  ~ 60^oC

 Conform to the standard: CE, the United States FCC, ROHS environmental protection, synchronized video recording system construction specifications