The Poly Sync 40+ is a silver speakerphone with USB-A, USB-C, and Bluetooth (A2DP, AVRCP, HFP, HSP) for flexible connectivity. It features a dynamic driver with a 55 dB signal-to-noise ratio and a two-way microphone with a frequency range of 100-6700 Hz and -45 dB sensitivity. The built-in battery provides 30 hours of talk time and charges fully in 4 hours. Includes the BT700 USB-A adapter for wireless connection.