Check the listing for details. Yamaha CK88 88-Key Portable Stage Piano Keyboard. Condition: New. Listed at 1349.99 USD. The CK88 turns everywhere you go into a stage or studio with intuitive controls, built-in speakers, and all the sounds you need to create your own sound. CK88 combines the sounds of the Yamaha CP Stage Piano with the organ and synth-focused YC Stage Keyboard for a totally new sonic palette. Pianos, electric pianos, strings, brass, organ and modern synth. Easy-to-use controls let you focus on the music, not the menu. Dedicated organ controls and Synth and Effect controls. It’s all battery powered and has built-in speakers to take your music where it’s never been before. Product Features Two split points increase flexibility to play three different sounds across the keyboard. Focused piano & keyboard sound set that's expressive & authentic for any musical needFeatures a variety of organ types, from vintage drawbar to combo transistor-based from Reface YC, for classic rock, pop, jazz, R&B and countryImitative sounds w/ realistic string sections, brass ensembles, & more add to the musical versatilityA collection of fat, deep and expressive synth sounds that can be controlled in real-timeExtensive onboard effects feature hands on controls to easily create your own soundOne-to-one interface keeps you out of menus so you can focus on the musicDedicated Part controls allow quick and deep tweaking without menu divingTwo customizable pedal inputs provide extra control for more expression4-Zone MIDI Master Keyboard Control allows powerful control over hardware/soft synths