iSpeaker M404 cascaded speakerphones 2.4G

2.4G Wireless Transmission: with a stable connection from the USB wireless receiver to the PC, the maximum distance between the receiver and microphone/speakerphones can be reached up to 12 meters.

Omni-directional Microphone: Full duplex Omnidirectional Mic, with 6 meters pickup range covering 80 sqm room.

Battery: 2,500 mAh battery, 8 hours talk time

Compatibility: Plug & play, compatible with Windows, macOS, Android, Linux.

HiFi Mode: Immersive sound for both calls and music

Interfaces and ports: Volume +, Volume -, Mute Microphone, Mute Speaker, HiFi, 3.5mm Audio Out, Mini-B USB power supply, Power switch

Wireless Daisychain Dual Speakerphone

2x Daisychained Wireless Speakerphones with USB receiver (Max. 12 meters wall-through wireless). With 6 meters 360° sound pickup distance, it can cover up to 80 square meters meeting room.

360° Omnidirectional pickup

The omnidirectional microphone provides 360° coverage and picks up sounds from any angle.
Ensure everyone clearly hear and is heard.

Immersive sound for calls and music

Experience the omni-directional microphone and HD Voice. Ideal for voice, music and multimedia by the HiFi mode.


Product name 2.4G Wireless Conference Speakerphone
Model iSpeaker M404
Interfaces Power Switch/ HIFI Mode/ Interface Switch
Volume + –
Microphone mute
Speaker mute
LED indicator Blue on: standby or communication mode
Blue and red are flashing alternately: microphone mute
Red flashing: speaker mute
Blue flashing: No 2.4G receiver is detected
Sound The sampling frequency of speaker: 24Khz ~ 48Khz
The sampling frequency of microphone: 16Khz
Hardware Double omnidirectional digital silicon microphones
4Ω6W speaker
3 meters of USB power supply cable (DC 5V/500mA)
3.5 audio output
Power switch
Power Operating voltage: 4.5V ~ 5.5V
Built-in lithium battery 3 .7V-2,500mAh
Microphone Digital silicon mic, omnidirectional
Sensitivity: -26 +/- 1 dB
Frequency: 100 ~ 10,000 Hz
SNR: ≥61.2dB
The maximum sound pressure level: 115dB
The maximum current consumption: ≤0.5mA
Pickup: 6 meters 360 degree
Coverage Up to 80 square meters room
Echo offset The maximum 256ms
Reverberation time < 0.5S
Product noise < 48dBA
Audio processing AEC/AGC/NR/NLP/ALC
Humidity -20.9
Temperature -40-70℃, 0-95% RH
Size 157 x 157 x 45mm (microphone unit)
Packaging size 435 x 210 x 90mm
Gross Weight 1.4kg (after packaging)


  • iSpeaker M404 Datasheet-21V1.0.pdf

    0.26M 20-07-2021
  • iSpeaker M404 User Manual-21V1.0.pdf

    0.44M 20-07-2021

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