Covert Mini Circular Mic with Pre-amp, Range 5m W23g

NV-YNSUPR-113 Circular Miniature Microphone

• Built-in lightning protection, power reversal of polarity protection. 
• Built in Pre-amplifier 
• Uniqe design, easy for hidden install

Parameter

• Voltage: DC 9-12 v
• Electric current: 20MA
• Frequency range: 100-100 KHZ 
• Pickup range: 3-5meters
• Connecting mode: Red (power is) Black (public) white (audio+)

Apply to Hikvision, dahua, hanbang and other video recorder