88 keys?? made by silicon rubber?? can roll up</br>Must connect with PC or laptop?? work with software</br>Compatible with Cakewalk?? Sonar?? Cubase?? Nuendo?? etc. major sequencer software and VST/VSTi</br>MIDI out?? you can record & edit music with MIDI software as a MIDI keyboard</br>Support chord sound?? bl