Three-microphone array - Keep the focus on your voice, not the background noise, with a multi-microphone array for echo and noise reduction. Full-duplex audio - Makes simultaneous conversations a breeze with full duplex audio. Smartphone charger - Keep your smartphone charged and ready using the USB-A port. Up to 20 hours of battery life - Work on the go - the battery stays charged for up to 20 hours. Wireless connection - Connect wirelessly to smartphones via Bluetooth® or to computers with the integrated cable. Certified for Microsoft Teams - Take your Microsoft Teams experience to the next level with a dedicated button.