The Casio CTK-3500 Portable Keyboard is ideal for the student musician wanting to develop independently. The 61 key scale length is suitable for younger and junior players who dont require a full size board. The CTK-3500 is equipped with Casios Dance Music Mode which allows you to create your own pieces with ease. This models 400 built in tones span a range of styles and instruments to keep your learning inspired. The CTK-3500s 2 sensitivity levels of touch response have a comfortable feel that encourages students to develop their expression on the keys. This model benefits from battery power so that you can take your music anywhere.