All-metal construction: exterior cabinet in Dur-Al alloy and interior tank/back cover in AISI 304 stainless steel. Steel security chamber. Microprocessor-controlled digital electronic circuit for speed, acceleration, braking, RCF, time, storage for 10 different programs, and operating alarms. Maintenance-free induction motor. Noise level 50-60 dBA. Heads, sockets, and adapters are laser-engraved. Air circulation system to limit excessive temperature increases. motor: induction, maintenance-free, noise level: 50–60 dBA, maximum volume: 120 ml, program storage: 10 programs, maximum tube capacity: 4 of 25 ml, air circulation bucket: yes, inner bucket material: AISI 304 stainless steel, exterior furniture material: Dur-Al alloy, security camera material: steel, accessory identification by laser: yes