The OSD Audio RX540 is a great wired rock speaker for smaller backyards and patios and a true customer favorite. Designed to simulate natural rocks within your landscape, the RX540 can be placed almost anywhere and deliver excellent audio quality. Designed to simulate natural rocks within your landscape, place the RX540 Rock speakers anywhere that a natural rock would be found. Typical locations for the rock speakers include rock formations for barriers around pools, ponds and spas or bordering a garden and even as an accent in flower gardens. Sold as each.