SIZHENG SIZ 160 Smoke sensitivity CCTV microphone 45dB PVC audio monitoring for audio surveillance system in CCTV Microphone from Security Protection

SIZHENG SIZ 160 Smoke sensitivity CCTV microphone 45dB PVC audio monitoring for audio surveillance system in CCTV Microphone from Security Protection
SIZHENG SIZ 160 Smoke sensitivity CCTV microphone 45dB PVC audio monitoring for audio surveillance system in CCTV Microphone from Security Protection

Product Specification

Model Number: SIZ-160

Brand Name: SIZHENG

Place of Origin: Guangzhou,China

Audio Monitor Range: 10~100 square meters (adjustable)

Use: For Surveillance Camera

Sensitivity: -45dB

Output Impedance: 600 ~1000Ω non-equilibrium

Supply Voltage: DC9V-18V (recommend to use 12V,more than 500 meters recommended 15 v)

Working Current: 25mA

Working Environment: -25℃~70℃

Product Size: 100mm*50mm

Housing Material: PVC



SIZHENG SIZ-160 Smoke sensitivity CCTV microphone -45dB PVC audio monitoring for audio surveillance system

 Key Features of SIZHENG SIZ-160 cctv audio microphone 

1.Smoke detector shape design,elegant appearance,high sensitivity, good for hidden installation,easy to install.

2.Built-in AGC micro controller, adjustable resistance control sensitivity.

3.Internal circuit is optimized circuit by voice, power amplifier circuit, maximum noise cancellation, guarantee the output intensity.

4.Using dolby omnidirectional logic surround sound system, built in high-speed voice DSP processing units and dynamic noise reduction processing.

5.Built-in ALC control circuit, automatically adjust the voice high,low intensity and instantaneous voltage and current surge.

6.Built-in lightning protection, power supply polarity reverse connect protection and power protection module.

7.Integrated professional front audio amplifier circuit, directly drive active speakers, DVR, earphone, etc.

8.Widely used in museum, securities compan, conference rooms, archives, corridor and other indoor places of synchronous monitoring audio recording.

 Specifications of SIZHENG SIZ-160 cctv audio microphone 

Items Performance Metrics
Audio Monitor Range 10-100 square meters(adjustable)
Audio Transmission Distance  1000m
Frequency Response 100Hz~20kHz
Sensitivity -45dB
SNR 80dB(1m40dB)40dB(10m40dB)1KHz 
Directional Property Omnidirectional
Dynamic Range 80dB (1KHz at Max dB SPL)
Max Sound Pressure 120dB SPL (1KHz,THD 1%)
Output Impedance 600 ~ 1000Ω non-equilibrium
Signal Amplitude 2.5Vpp/-25db
Microphone  Electret condenser microphone
Connection Way 3 leading wires (red wire is power+, white/green wire is audio signal+, black is power-&audio signal-)
Transmission Cable Telephone wire, Network twisted pair, RVV cable 
(pls use shield cable in complex electromagnetic environment)
Supply Voltage DC9V-18V
(recommend to use 12V, more than 500 meters recommended 15V)
Working Current 25mA
Housing Material PVC
Color ---
Product Size 100mm*50mm
Place of Origin Guangzhou, China


 Product Photos                                              






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 Attention Please:                                 

1. SIZHENG Brand Anti-counterfeit:

There are a large number of users complained a lot of undesirable businessmen who use similar appearance of "Cheap Copy Products" to simulate SIZHENG TECHNOLOGY audio monitoring products. We hereby declare: Sizheng Technology is the only SIZHENG trademark and patent holder and the manufacturer, our all audio monitoring products with anti-fake label, please pay attention to identify.

2. Feedback and Problem:

If you have any questions about our products or order, frst of all, please feel free to contact us. We will do our best to solve your problem. Please do not give us negative feedback without any communication or without recieving the products. We are business man with serious & sincerely to cooperate. So we hope you are a kind man too.Thanks. 


1.We promise warranty for 36 months for COTT series,12 months for SIZ & QD series. If it is man made damage, you will pay for the cost charge.

2.If you are not satisfied with our products, you may return the goods for exchange but please commnicate with us before return. The shipping and handling charge is not refundable and you should pay for all the charges of returning and reshipping.

3.All return itemd must be in good condition, and they must be under resalable condition.


1.We will send the goods within 7 working days after your payment is verify by Aliexpress.

2.Our free shipping only included China post air mail, and the weight should be within 2KG. Please notice the China post air mail are slowly. If the weight over 2KG, you should responsible for the shipping cost.

3.If you want to send by EMS, DHL and UPS, you should pay for the shipping cost.

4.You will trace the goods online after sending the goods 3-7 working days.

5.Please check your goods on the shipping company when you receive the goods.


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