Equipped with newest ThermoElectric heating technology, should the ambient temperature fall below set temperature, unit will heat to maintain your set temperature. Dual-zone offers two independent temperatures settings. Total 21 standard bottles capacity with 6 bottles on top and 15 bottles on the bottom. Double pane insulated glass door. Stylish design will compliment any kitchen or entertainment area. Simple to use digital controls with LED display. ThermoElectric Technology (no compressor) offers a quiet operation with no vibration. Adjustable temperature between 45 to 64 degrees F. Note on thermoelectric cooling Thermoelectric cooling uses the Peltier effect to create a heat flux between the junction of two different types of materials -- which transfers heat from one side of the device to the other. The benefits of thermoelectric cooling include energy efficiency, environmental friendliness and quiet operation (as there are no moving parts or circulating liquid). There are, however, limitations. Since a thermoelectric unit does not produce cold air but transfers heat from inside the cooler, the surrounding temperature plays a major role in the unit’s cooling efficiency. Thermoelectric cooler performs best when ambient temperature is in the mid-70 degrees F. When the ambient temperature gets too hot (over 80 degrees F), the unit will have a hard time removing enough heat to keep the interior temperature at the ideal wine storage temperature of 55 degrees F. Features and Functions ThermoElectric cooling system 21 standard bottles (6 and 15) / 65L capacity Digital controls with LED temperature display Environment friendly (refrigerant free) Quiet operation No vibration (bottle sediment is not disturbed) 6 slide-out shelves Double pane insulated glass door Soft interior light Front leveling leg Adjustable temperature range: Top 45~64 degrees F / Bottom 51~64 degrees F Freestanding application ETL Specifications Capacity :21 bottles / 65 liters Input voltage: 110V / 60Hz Current : 1A (77 degrees F) Input power : 140W Protection class : I Climate class : SN:N Noise level : 45.16 dB Power consumption : 1.1kWH/24hr (59 degrees F) Color : Black Temperature range (top / bottom) : 45 ~ 64 degrees F / 51 ~ 64 degrees F Max working temperature : 89 degrees F Unit Dimension (W x D x H) : 13.58 x 20.28 x 31.7 in. Package Dimension (W x D x H) :15.6 x 22.2 x 32.7 in. Net weight : 43 lbs Gross weight : 46.8 lbs