Designed and Optimized for Superior Sound and Performance Specifically for CISCO IP Telephones
Cisco IP Models: 6921, 6941, 6961, 7821, 7841, 7861, 7931, 7940, 7941, 7941G, 7942, 7942G, 7945, 7945G, 7960, 7961, 7961G, 7962, 7962G, 7965, 7965G, 7970, 7971, 7971G, 7975, 7975G, 8941, 8945, 8945G, 8961, 9951, 9971
Also works Call Master V , Call Master VI & Grandstream GXP-2000