Customizable Media Rack Shelves: This media rack has 2 adjustable shelves to customize your storage needs. Sonos Connect (ZP90) Compatible: The 2 included Sonos Connect (ZP90) units can connect to your home audio system. Durable Construction: Made from sturdy steel with a black powder coat finish for durability. Versatile Storage: Adjustable shelves can be used to store media components, electronics, and more. Compact Size: Measures just 2 units high and 15.5 inches wide for space-saving use. Penn Elcom Custom Media Rack Shelves (2U, 2 x Sonos Connect (ZP90 Unit))