What size room the AVer 20m Expansion Microphone covers, how many people it suits and when you need extra microphones.
Short answer
We recommend it for medium rooms (6–10 people) and large rooms (10–16 people).
The specs that decide room size
| In the kit | Expansion microphone with 20 m cable |
How room sizes map to people
| Room type | Typical people | Typical size |
|---|---|---|
| Small | 4–6 | 150–250 sq ft |
| Medium (this one) | 6–10 | 250–400 sq ft |
| Large (this one) | 10–16 | 400–600 sq ft |
| Boardroom | 16+ | 600+ sq ft |
General industry guidance; furniture, room shape and acoustics change what works.
How many do you need?
Start with one per section of table beyond the main microphones' reach.
If your room is bigger or smaller
- Bigger room: Poly Studio A2 Table Microphone (Medium, Large, Boardroom, $339)
Not sure? Send us your room dimensions and seat count and we'll recommend a setup. Free room planning
More 20m Expansion Microphone guides
- 20m Expansion Microphone buyer's guide: specs and price
- 20m Expansion Microphone: setup guide
- 20m Expansion Microphone: troubleshooting
- 20m Expansion Microphone: Teams, Zoom and Google Meet
- 20m Expansion Microphone: price and total room cost
- 20m Expansion Microphone: alternatives compared
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Outfitting several rooms, or reselling? Get a volume quote or apply for wholesale pricing →
