The Poly Sync 40+ is a Microsoft Teams-certified speakerphone with USB-A/C and Bluetooth connectivity. The silver device features a dynamic speaker and dual-directional microphone (100-6700 Hz, -45 dB sensitivity) with a 55 dB signal-to-noise ratio. The built-in battery provides up to 30 hours of talk time, with a 4-hour charge time. Includes a BT700 USB-A adapter. Compatible with Bluetooth profiles A2DP, AVRCP, HFP, and HSP.