Enjoy professional conference audio quality anywhere. No matter if you are listening to music or in a conference, you'll benefit from impressive sound with minimal echo and disruptive background noise to ensure your voice can always be clearly heard. Customisable With customisable buttons for your preferred features incl. playing/pausing music, re-dialling the last number or launching voice assistants. Plus a clearly visible status light lets others know when you're on a call - even from a distance. Please note: We recommend the Poly Plus Service for this product. The Plus Service includes the following: - Software upgrade and updates - Spare part service - Next business day - Poly Online Support Center access - Technical escalation support - 24 x 7 technical phone support - Priority technical support - Ecosystem Cloud Partner (ECPS) support - Network diagnosis tests, e-mail notifications - Discount on Professional Services - Poly Lens premium features - Enhance support calls with live video diagnosis Poly SYNC 20 1Y Plus Service (487P-SYNC20-112) Poly SYNC 20 3Y Plus Service (487P-SYNC20-312) The service can be extended.