Choosing between the Poly Sync 40 and the Yealink CP900? Here's how they differ on room size, platforms, audio and price, and which one fits your room.

Short answer: pick the Poly Sync 40 if you want the one that also supports Zoom. Pick the Yealink CP900 if you want the one that also supports Teams.
Both are USB speakerphones for focus to huddle rooms; the difference is audio and price.
Side by side
| Poly Sync 40 | Yealink CP900 | |
|---|---|---|
| Price | $215 | $219 |
| Platforms | Zoom and BYOD/USB | Teams and BYOD/USB |
| Microphones | 3-mic steerable array, pickup about 8 ft | Six MEMS microphone array, SNR +59 dB |
| Pickup range | — | Up to 6.5 feet / 2 meters |
| Talk time | — | 12 hours |
| Dimensions | 102 x 273 x 38 mm | — |
| Weight | 610 g | 320g / 11.28 oz |
| Warranty | 2 years limited | — |
| Connections | USB-A cable with USB-C adapter, Bluetooth 5.1 | USB 2.0 PnP & Bluetooth 4.2, USB cable 0.9 m |
Specs are Poly and Yealink's published figures. Prices can change.
The key differences
- Microphones: Poly Sync 40: 3-mic steerable array, pickup about 8 ft. Yealink CP900: Six MEMS microphone array, SNR +59 dB.
- Platforms: the Poly Sync 40 lists Zoom and BYOD/USB; the Yealink CP900 lists Teams and BYOD/USB.
Which should you buy?
- Choose the Poly Sync 40 if you want the one that also supports Zoom. Best for focus and huddle rooms, with Zoom and BYOD/USB. See the Poly Sync 40
- Choose the Yealink CP900 if you want the one that also supports Teams. Best for focus and huddle rooms, with Teams and BYOD/USB. See the Yealink CP900
Also compared
- Poly Sync 40 vs Jabra Speak2 75
- Jabra Speak2 55 vs Poly Sync 40
- Jabra Speak2 40 vs Poly Sync 40
- Yealink CP900 vs Jabra Speak2 75
- Yealink CP700 vs Yealink CP900
Still deciding? Read the Poly Sync 40 guide and the Yealink CP900 guide, see Sync 40 alternatives and CP900 alternatives, compare them interactively, or send us your room details for a recommendation.
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