Snap-In 3.5mm Stereo F/F Keystone Insert Module - White\nOur keystone snap-in modules provide a full range of solutions for voice, home networking, home office, audio/video and more. With the wide selection of snap-in modules, you can custom-configure your keystone wall plates and patch panels for greater control and more flexibility. Use this coupler for 3.5mm audio applications; just snap it into patch panels, compatible wall plates and surface boxes.