The AFS17PVLHD is an upright frost-free all-freezer with a temperature range of -30°C to -10°C as recommended for various vaccines and pharmaceuticals. The microprocessor temperature controller is externally located to minimize door openings, helping to protect stored contents from ambient temperature. The buffered temperature probe is encased in a glycol-filled bottle to better simulate the temperature of the stored product, with an additional sensor that reads air temperature to ensure superior temperature control. The current and min/max temperature display is viewable in Celsius or Fahrenheit . The audible and visual temperature alarm sounds if the unit's interior goes out of range. Additional alarms include a power failure alert, door open alarm, and sensor failure alarm. It features six adjustable plastic-coated wire shelves that can be positioned at 1/2 inch increments to accommodate virtually any sized item. Unit includes LED internal lighting with an on/off rocker switch.