Reach new espresso heights with the Open Box Diletta Alto Espresso Machine. Diletta's first dual boiler, the Alto features PID-controlled brew and steam boilers for best in class temperature management. Only an inch wider than the original Diletta Bello, the Open Box Alto still manages to fit a 0.75L brew boiler and a 1.6L steam boiler in its counter-friendly case. Inside, all the user-friendly features found in the Bello+ make an appearance, including favorites like on-the-fly temperature controls, automatic shot timing, programmable preinfusion, and low power eco-mode. Experienced baristas will also love the Open Box Alto's upgrade to sprung valves with tap-to steam controls, and a top-accessible OPV valve for brew pressure adjustment.