USB & Bluetooth Conference Speakerphone-KT-M4B

    ◈ Internet conference call

    Support general audio and video conferencing software, such as Zoom, WeChat etc.

    ◈ Bluetooth call

    After mobile phones and tablets are connected to the device via bluetooth, they can have high-quality speakers and microphones

    ◈ The third generation

    KATO voice processing Technology

    Smart pickup with 360° high coverage

    384ms echo cancellation

    Full-duplex call technology

    Intelligent dynamic noise reduction

    HD audio

    In Bluetooth playback mode: 48K playback sampling rate

    ◈ Portable microphone and speaker

    No need to drive, plug and play

    Clear sound quality, no noise and no harshness

    Small size, easy to carry

    Share This Product



    Desktop host computer with audio processing function and USB function control,

    indicator lights and buttons

    Built-in large capacity lithium battery

    Bluetooth 5.0


    Diameter 120mm

    Height 39.5mm

    Net weight



    Carbonite Grey


    USB 2.0

    (compatible with USB 1.1)


    Omnidirectional microphone

    Audio bandwidth 100~16KHz

    Sensitivity: -38dB

    94dB SPL@1KHz

    Signal to noise ratio: 65dB

    94dB SPL@1KHz, A-weight


    2 inch antimagnetic speaker


    Power supply

    USB bus power supply (5V500mA)

    Built-in lithium battery power supply (2000mA)

    Computer system requirements (USB)

    Windows 8 / Windows 7 / Windows 10/mac OS, etc

    Mobile phone operating system (Bluetooth)

    Android, IOS


    Mute microphone`

    Volume up/down adjustment

    Bluetooth wireless communication


    Bluetooth key (icon status)

    Microphone mute button

    Volume up button

    Volume down button

    Switch button (when a call comes in, short press to answer

    or hang up; long press to switch)

    Product Performance Standards

    YD/T 993-1998

    GB/T 9254-2008

    GB 4843.1-2011

    LED status indicator

    Normal work:

    the green light always on

    Speaker mute:

    flashing green

    Mute microphone:

    red light always on

    Volume adjustment:

    indicator light flashes

    Low power:

    orange indicator light flashes

    Indicator red light always on: charging, the red light goes out after full

    Environmental requirements

    Temperature: 5°~44°

    Humidity: 20~85% (no condensation)

    Noise level: <48db Storage temperature: -10°~55° [/av_textblock] [/av_two_third][av_one_third min_height='' vertical_alignment='' space='' custom_margin='' margin='0px' padding='0px' border='' border_color='' radius='0px' background_color='' src='' background_position='top left' background_repeat='no-repeat' animation='' av_uid='av-sri8zq'] [av_textblock size='' font_color='' color='' av_uid='av-rptiee']

    Download Data

    If you are interested in our product USB & Bluetooth Conference Speakerphone-KT-M4B, please click here to download our latest file, so that you can discover more about Kato Vision.

    Send Us a Message



      Copyright © 2021 Shenzhen KATO Vision Co., Limited | All Rights Reserved | Powered by Nocti Solution