Cisco Compatible Plantronics EncorePro 720 HW720 Noise Canceling Direct Connect VoIP Headset Bundle Cisco 69xx, 78xx, 79xx, 89xx, 99xx Series Phone Bundle of 2 items - Plantronics HW720 EncorePro Headset and Cisco compatible telephone interface cable Compatible Cisco VoIP Phones: 6921 6941 6945 6961 7821 7841 7861 7931G 7940G 7941 7941G 7942G 7945 7945G 7960 7960G 7961 7961G 7965G 7970 7970G 7971G 7975G 8811 8841 8851 8861 8941 8945 8961 9951 9971 Ultra Noise-Canceling microphone filters out background sound Quick Disconnect - Allows for easy disconnect from phone without removing headset High quality lightweight nylon composite materials provide an ultra-lightweight design