Check the listing for details. CT-X3000 Portable Keyboard. Condition: Open box. Listed at 348.89 USD. The CT-X3000 is a 61-key portable keyboard with sound quality that rivals keyboards costing much more. The all-new AiX Sound Source delivers 800 Tones, 235 Rhythms and 100 DSP effects (all editable), which come to life with a powerful stereo speaker system. Designed to inspire musicians of any level, the CT-X3000 is perfect for solo performers, songwriters, or anyone else who wants incredible sound at an impossible price.Aix Sound source:The AiX Sound Source delivers lifelike, natural, authentic sounds in every category. Acoustic and electric pianos, guitars, basses, brass, strings, drums, synths and other sounds come to life with stunning detail across 800 Tones and 235 Rhythms.800 Tones / 235 Rhythms / 100 DSP Effects All Editable:100 DSP effects are also included, including vintage.