Specification
| Microphone | |
| Pickup Distance | 5 Metres Radius |
| Microphone | 6-Element Microphone Array |
| Frequency | 150Hz~8kHz |
| Sensitivity | -38dBV |
| Signal to Noise Ratio | 65dB |
| Features | Advanced Echo Cancellation, Intelligent Noise Reduction, Wideband voice processing |
| Speaker | |
| Maximum Sound Pressure Level | 80dB SPL@1m |
| Distortion | ≦4% @150Hz~16kHz |
| Signal-to-noise Ratio | ≥75dB@1m |
| Frequency Response | 150Hz~16kHz |
| Features | Simultaneous connection (USB, Bluetooth, AUX), Daisy-chain (require optional MAXHUB special AUX cable) |
| I/O Ports & Buttons & Indicators | |
| USB | USB Type C (Audio in/ out + Charge 5V/ 2A) |
| AUX | 3.5mm (Audio in/ out) |
| Bluetooth | BT4.2+EDR |
| Mode | Music mode/ Call mode |
| Buttons | (in Bluetooth mode) |
| Indicator Light | 6 (Power, Answer/ hang up, Mute,Bluetooth, Volume+, Volume-) Power, Volume, Blutooth, Microphone Mute, Answer/ Hang up) |
| USB Features | |
| Colour System / Compression | H.264/ YUY2/ MJPG |
| USB | USB 2.0 |
| UAC | UAC Audio Compatible |
| Physical Specification | |
| Dimension (Diameter×Height) | 120mm×35.2mm |
| Net Weight | 395g |
| Colour | Dark Grey |
| Battery | |
| Battery Capacity | 7.4V/2200mAh Wired 5V/2A |
| Charging Requirement | Wireless 5W |
| Battery Life on a Single Charge | Up to 8 hours |
| Features | Support Wireless Charging |
| Package Contents | |
| BM21 Speakerphone | x1 |
| USB Cable | x1 |
| AUX cable | x1 (3.5mm Audio) |
| Quick guide | x1 |
| Environment | |
| Operating Temperature | -5℃~40℃ |
| Operating Humidity | 10%~90%RH |
| Storage Temperature | -20℃~60℃ |
| Storage Humidity | 10%~90%RH |