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Wireless 3-5 M Radius 20Hz Wall Listening Device

Categories Wall Listening Device
Brand Name: HEWEI
Certification: YES
Place of Origin: CHINA
MOQ: 1 set
Price: USD/Set FOB shenzhen
Payment Terms: T/T
Supply Ability: 10 sets per month
Delivery Time: 20 working days
Packaging Details: carton case
Pickup radius: 3-5 m
Working current: 10-15 mA
Antenna: built-in antenna
Ground noise: less than 20Hz
Transmission distance: Long
Urban real visual environment: 500-700 m
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Wireless 3-5 M Radius 20Hz Wall Listening Device

High Sensitivity Wireless Listening System Device 3-5 M Radius Pickup Clearest Sound


This wireless listening system consists of wireless transmitting part and receiving part, the wireless transmitting parts can be perfectly fit with a variety of electric equipment as camouflage, it can obtain evidence and does not affect the normal work as an electrical appliances. Low power consumption, built-in high-performance rechargeable lithium batteries, it can work more than 20-60 hours continuously.(Different modules)

Long transmission distance, which is about 500-700m in the urban visual environment.

This wireless listening system is widely used in the family, hotel, warehouse, office, conference room, criminal scene etc.

Technical Parameters

Wireless Transmitting Parts

Channel:has 10 different options

Ideal transmission radius: outdoor environment: 1000m
Urban real visual environment: 500-700 m

Working current: 10-15 mA

Working voltage: DC 5V

Transmission power: 40 mW

Antenna: built-in antenna

MIC pickup sensitivity: - 58 db

Ground noise: less than 20 Hz

Working time: 220 v It can keep working all time with connecting 220V power source, Black module it can work more than 20 hours continuously with built-in lithium battery .

Charging time: about 3 hours (1000 mAh), about 6 hours (20000 mAh rechargeable treasure)

Receiving part


Weight: 240g

Receiving sensitivity:0.20μV@20/25KHz typical

Audio power rating:1 W

Audio distortion: 5% or less

The power voltage:7.5V DC ±20%

Working temperature:-25℃~ + 60℃

Have playback function

The recording file format:WAV


With headset

The recording time:500 hours

USB2.0 Extract: support

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