On both of the Casio CDPS models you can connect them to your devices via the popular Chordana App from Casio, which opens a world of practice, sound and creative possibilities to any player. The pianos are also Midi compatible.
On both models as well, which I think sets them apart from other digital pianos of this style, is that you can take them anywhere? Powered by Batteries. So you could go to a gig, practice session or another position in the home for practice, without having to connect to mains power.
The Cdp-S350 models offers all the above features, plus having a total of 700 tones! and 200 styles / drum beats to play along too. Just a foot note as well, both models do Transpose allowing the player to easily adjust the key when accompanying a singer or orchestral group.
I think anyone would agree the Cdp-s series does offer a superb product packed with great features, quality sound and touch, in a compact case design, that would fit into any household or be moved very easily for gigs or tuition work.