These are portable speakers that you can take anywhere you go. They let you have a conference call that others in the room can participate in. All models make sure that both sides of the call hear each other clearly and without distortions.
The basic model is great for small rooms and connects to your laptop, tablet, or phone via USB or 3.5mm cable. Mid-range model adds the option to connect wirelessly via Bluetooth. The high-end model can handle large meeting rooms with around 15 participants. It has special ZoomTalkTM microphones that isolate the voice of the person speaking.