The Speaker/Microphone Accessory Kit retrofits to any Peerless-AV® KOF5 Outdoor Digital Menu Board models for quick and easy installation. The accessory seamlessly aligns with the conduit knockouts on the sides of the base for easy cable management. ACCK119 ships with (2) speakers and microphones, but if an existing system is already in place, the speaker boxes are large enough to fit most major speaker/microphone manufacturers.