Works with the following Comdial models: 3000 Series, 6000 Series, 7700 Series E-1 Color: Black Recommended handset cords: 9 - HS CORD13700 (Bagged) HS CORD 13701 (Bulk) 12 - HS CORD13000 (Bagged) HS CORD 13001 (Bulk) 25 - HS CORD 13500