The new CT-S1 has a simple design layout, made up of the row of keys, built-in speakers and a limited selection of buttons. Thanks to its slim profile, the CT-S1 is convenient for casual play on demand and is offered in three colour variations - white, black and red, making it easy to blend in with any decor.The richly expressive Casio AiX Sound Source staple ensures high-quality tone and the newly developed acoustic design delivers impressive and powerful sound output. Created by carefully modeling the acoustic and vintage instruments used in many classic songs, with 61 built-in tones. In addition to the 10 Advanced Tones crafted using the best of Casio technology, the CT-S1 includes a special selection of 12 Casio Classic Tone presets, selected from among the many distinctive digital instruments Casio has developed over the years. The efficient spatial design delivers powerful sound brimming with presence using an original horizontal bass reflex speaker system design.The CT-S1 also connects to smartphones, tablets and other devices using the separately sold Bluetooth® adapter to create an even bigger world of musical enjoyment - from using the unit as a wireless speaker to playing along with favourite songs. The dedicated Chordana Play app enables the user to change the tempo or key of songs being played and display music scores and piano roll notation, enabling individuals to practice at their own pace.Features 61 full-size touch response keys 61 tones including: 7 new "advanced" and 12 "classic Casio" tones 64-note Polyphony Class-compliant USB-MIDI Optional Bluetooth audio/MIDI adapter Includes AC adapter 2.5W + 2.5W Bass Reflex Speaker System