Dual-zone offers two independent temperatures settings. Total 24 standard bottles capacity with 8 bottles on top and 16 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 45F to 54F for upper compartment and 54F to 65F for lower compartment. 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-70F. When the ambient temperature gets too hot (over 80F), the unit will have a hard time removing enough heat to keep the interior temperature at the ideal wine storage temperature of 55F.