Covert Smoke Alarm design Mic Pure Sound AGC Cov 80m2

NV-YNCS-40 Smoke Alarm Shape Sound Monitor

• Built-in Imported chips, high sensitivity, beauty voice
• Integrated import front audio amplifier, microphone can drive directly Active speaker, DVR and recorder
• The unique design of the "electronic noise dynamic closed loop suppression circuit" can eliminate "hiss" electronic noise, realize perfect radio
• Using Dolby noise reduction technology, less noise
• Using echo eliminate technology, effectively reduce the echo
• Built in mini audio amplifier and noise reduction module 
• Automatic gain control (AGC) circuit

Parameter

• Monitoring range: 10-100sqm (adjustable)
• Working voltage: 9-12 V DC regulated power
• Supply current: 20mA
• Operating Temperature: - 30 ℃ ~ 60 ℃
• Transmission distance: up to 3000meters
• Sensitivity Reduction: -35db
• Signal Noise Ratio: 70db
• Frequency response: 20hz to 20KHz
• Directivity: Omni directional
• Output signal amplitude: 2.5 Vpp /- 25 db
• Maximum sound pressure: 120db SPL (1 KHz, THD 1%)
• Connecting way: red line--power, black line - ground wires, white line -- audio
• Transmission cable: 0.5 mmRVVP 3 core shielded cable, ordinary 4 core telephone lines, five types of network twisted-pair cable