Keystone insert enables subwoofer to home theater connection.FEATURES AND BENEFITS:- Pair with a 1-Port, 2-Port, or 4-Port adorne frame for use in any adorne wall plate.- Easy "1-for-1" installation lets you simply replace your existing inserts with adorne in just minutes.- adorne fits in your existing electrical box and does not require new wires for typical installation. Innovative assembly and snap-in system make it fast and simple to install.- Easily customized with adorne wall plates available in a brilliant palette of 32 colors and a variety of luxurious materials.