Specification:

One add-on mini audio box for all Camera which need audio function
High Sensitive microphone and 12V power regulator built-in box
Plug & Play 
Extremely Sensitive 
Great for Security Monitoring 
Higher S/N Ratio 
Range: 150 Square metres 
Audio Output: RCA Female 
Red wire ---Power+
Black wire—Power-
S- Black signal
S+ Green signal
Technical:
1.Work Voltage: 4-14V
2.Work current: 5mA-60mA
3.Sensitivity: 200mA/ubar
4.Frequency: 100-6000Hz
5.Max output Voltage:5V-upp

Package includes:

1x Mini CCTV Audio Microphone Mic For Security Camera DVRs
    
Kindly Note: 

If you need a huge quantity, contact us to get more competitive offer. 

Shipping and Payment:   

Payment : Paypal
Shipped within 1 business days once payment done. 
Ship via USPS 1st class mail with Tracking Number,2-5 days to reach you. 

Refund and Guarantee:

30 Days Money Back Guarantee
180 Days - Free Exchange
Please contact us with any questions or concerns,we will solve it until you satisfy.