Interior and exterior are entirely constructed from stainless steel for lasting durability and easy cleanup, Alarm will beep 3 times if the door is left open for 30 seconds, 5 times at 60 seconds, and will sound continuously if the door is open for more than 5 minutes, Interior is pre-set to -25 C, with an adjustable control range from -30 to -15 C, Ships with a set of casters (2 locking) for easy mobility as needed, Digital controls with a large LED readout in Celsius or Fahrenheit for intuitive temperature management, Visual and audible alarms alert if the interior temperature rises or falls out of set range, Top-mounted commercial fan ensures rapid temperature recovery, Designed and engineered to store vaccines and other sensitive materials under stable temperature conditions, Adjustable cycle defrost operation ensures the unit avoid temperature spikes and ice buildup, Closes to save energy but will remain open when the door is opened at a 90 angle for easier loading