A 73 key stage piano and then you can enhance and expand it by installing additional sound modules into the front panel.
Each piano comes with the mainboard containing the basic control and effects section. They come with the Electric Piano and Sound Collection modules installed and number of free slots for other modules. Then you can add additional piano modules if you wish. At the moment these include a Clavi Module, Acoustic Piano Module and an External Module. In the future there may be a String Machine or Organ; whatever people want.
The module itself sits into the front panel and they have their own retro-styled controls all ready to go. It looks quite brilliant and is a remarkable idea especially for something like a stage piano.
The sound generation technology is a combination of Physical Modelling on the electric pianos and High Definition Sampling on the Sound Collection and acoustic piano. You get full polyphony on the piano sounds and to 128 on the others. The effects engine is packed with modulation effects and delay and there are six types of reverb. The master output has a 3-band EQ.