They work fine with any Windows / Mac OS communication app (Teams, Skype, Discord, Zoom, WhatsApp etc.). There is no special Teams-button, only Mute that works universally. Audio/Mic quality is excellent for calls with Wireless (USB dongle) connection, mediocre over BlueTooth. Battery life is around 7 hours of music / calls so I switch them off between calls and they last a few days. For me these are the most comfortable (very lightweight) on-ear headphones I've had so far and I use them every day (for calls).