The ULT2586-10HD-V PLUS HD Ultra-Low Temperature Upright Freezer from Thermo Scientific Revco is a freezer you can rely on for a high efficiency storage and space in your lab. It features a manual defrost with -50 To -80 degrees C temperature range. Its setpoint security feature has a key-operated switch for main power and alarm locks in temperature and alarm setpoints while the alarm test simulates temperature alarm conditions, the alarm reset mutes audible alarm and resets A.I.M. (Automatic Incident Monitor). Further this unit has an Extreme ambient alert, Clean filter, Alarm battery low indicator, Voltage indicator, Warm and cold alarm setpoint controls and many functions more that gives the user a complete control over the freezer and ensures maximum safety for your valuable items.