The standard features of this 1.0 Cu/Ft (28L) Scientemp ultra-low freezer include a Micro-processor-based controller, which sounds an audible alarm. The temperature Range is -50C to -86C. It also features manual defrost and keylocking door. Unit comes with leveling feet. Recorder is an additional option at additional cost if required. A phone dialer back-up system is available at a small additional cost; if the alarm goes off it phones a number (like a pager or phone). Other available accessories include a CO2 or Liquid Nitrogen Back-Up System, Freezer Racks, and Access Port Holes for probes, cables or instruments.