Chat 150, Accessory Kit for 2410, 2420, and 4610 The Chat 150 for enterprise phones connects to leading telephone models, transforming them into high-performance conference phones. There is no need to pull additional lines into the room to enable conference phone capability --- just plug the Chat 150 into the phone and begin using. Featuring ClearOne's trademark audio processing performance, Chat 150 delivers unmatched full-duplex capability for crystal-clear communications. It includes three built-in microphones for full 360-degree pickup.