Multi-scale fingerboard is an alternative design for guitars and bass guitars in which the lower-pitched strings gain more length and the higher-pitched strings get shorter, similar to the string lengths on a grand piano. The reason for the uneven scale length across strings is that it evens out the tension across all of the strings, it evens the timbre across the strings, and extending the lower string scales allows the string to produce harmonics that are more in tune with the fundamental.
Since there are so many digital pianos worthy of your attention in this catalog, you may want to narrow down your choices using some of the search options on the sidebar. For example, if you select stage digital pianos under the category section, you'll be presented with all the digital pianos that were made for the stage. Once here you have the opportunity to drill down even further and can search by topics like number of keys, MIDI/USB Connections or by whether or not the digital piano has built-in speakers.