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.
Maybe you've already got a specific brand in mind and want to see all the digital pianos they offer. All you have to do is click on the brand on the left hand side of the screen and within a few moments you'll have access to everything that's available. For that matter, you can always play is safe and stick to the top-rated items…and there are plenty of those in this selection.