| Physical characteristics | - Height: 64mm (2.5 inches)
- Width: 120mm (4.7 inches)
- Depth: 120mm (4.7 inches)
- Net weight: 544g
- Gross weight: 1120g
- Color: galaxy gray
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| Microphone features | - 8-element omnidirectional microphones array
- Voice pickup range: 5m (16ft)
- 65dBA@20kHz bandwidth, A-weighted
- ―26dBFS 94dB SPL@1kHz
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| Speaker characteristics | - Rated output power: 4Ω/1.5W
- Speaker frequency response: 155Hz~16kHz
- Speaker volume: 80±3dB (500,600,800,1200Hz) @1W/1m
- THD<3%
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| Audio characteristics | - Beamforming supported
- Maximum background noise suppression:18dB
- Full-duplex communication
- Echo cancellation: coupling loss≥56dB
- Automatic gain control (AGC) within 5m
- Reverberation suppression: RT60<1s
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| Daisy-chain | - POE UTP RJ45 (CAT6)
- Maximum daisy chain units: 5 units of A20
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| Power and connectivity | - External power supply: DC 48V/0.6A or USB 5V/0.5A
- Compatible operating systems: Windows/Mac/Linux
- USB port: USB 2.0 Type-C
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