The Poly CCX 500 Microsoft Teams Phone has workers feeling confident they'll sound professional on every call. No word or inflection is missed, thanks to legendary audio quality, Poly HD Voice, and Poly Acoustic Clarity. And let's hear it for Poly Acoustic Fence. It eliminates background noise to keep calls quiet wherever it's noisy-like open offices and call centers. Compared to the CCX 400, the CCX 500 builds on the CCX 400's features with more advanced chipsets and optional handset support, making it more versatile. 2200-49720-019