Dual-zone means the unit has two independently controlled compartments. One zone can be set to a cooler temperature (for white wines, rosé, beers), while the other is warmer (for reds or beverages you prefer less chilled). This lets you store different drinks at their ideal serving temps in one unit.

It can store a mix of wine bottles and beverage cans. For wine bottles (standard 750 mL Bordeaux style), the capacity is likely somewhere around 40–60 bottles (depending on layout). For cans, it may hold 80–120 standard 12-oz cans (depending on shelf configuration).

Yes, it’s designed for built-in (under-counter) or flush installation, thanks to a front-venting design. The cooling vent is at the front so you don’t need free space behind or above the unit.
Just make sure you leave the front vent area unobstructed so heat can escape properly. Also check for any manufacturer-specified clearance for the top or sides.