One Cord Does It All. When You Need A Headset Adapter And An Audio Booster, Omnicord™ Is The One-Piece Solution. Omnicord Works With Most Telephone Brands, And Makes Headset Setup Easy. Reduces Workspace Clutter And Equipment Costs. Works With Most Phone Types. Compatible With Major Headset Brands. Boosts Microphone Volume When Needed. Connecting Types: G-Type (Gn Netcom) Quick Disconnect. For Use With: Desk Phones And G-Type Qd Headsets. Accessory Type: G Cord. Color(S): Black..