The faceplate is made of 304 stainless steel while the cavity is made from imported resin. The two different material not only presents an elegant look and shimmer but also be practical and durable. Kiwi Ears Allegro Pro is the latest iteration of Kiwi Ears' innovative DAC/AMP lineup, building on the success of the Allegro Mini. Designed for gamers, audiophiles, and everyday music enthusiasts, the Allegro Pro offers significant upgrades in sound performance, output power, and device compatibility.