Also available are 2 types of dual-key units. A Type D is the smaller dual key unit measuring at 1,695 square feet. It comes with 4 +1 bedrooms and 3 baths. The extra unit comes with a balcony, studio + bath and kitchen. Dual key units provide an option to the homeowner rent out the extra space. A Type E1 is the bigger dual key unit, offering 1,906 square feet of space, and equipped with 4+1 bedrooms and 4 baths. Both units share the same layout and are mirror images of one another. The only difference is the difference in their sizes.