This sterilizer is as simple as you can get. Very easy to use. It's large chamber capacity holds 4 trays. You can fit a lot of instruments in this one. Please Note: That this is a 220V sterilizer. It takes 20 minutes to complete sterilization cycle from a warm start. It's a 10" dia x 18" deep chamber. You can fit a lot of instruments in this one. Tuttnauer autoclaves set the standard for steam Sterilization. The Tuttnauer autoclave is designed to compliment any healthcare and laboratory facility and satisfy all of your sterilization needs. Time-tested reliability and durability are built into every Tuttnauer product. Automatic shut-off at the end of both the sterilization and dry cycles. A long life electro-polished chamber and door. Double safety locking device prevents door from opening while chamber is pressurized. Overheat cutoff prevents burnout of heating elements in case of insufficient water in the chamber. Drain valve is located on the front, allowing for quick and easy draining of water reservoir. Dual safety thermostat to protect against overheating. Speed and reliability are accomplished without sacrificing load.