WK-225 Features 76 Keys 48-note polyphony AHL sound source 600 Tones, 180 Rhythms Step Up lesson system Single X Style Stand Nady HP03 Closed back Headphones AD5 Power Supply Can be powered by batteries or with the included AC adapter The WK-225 at a Glance The new Casio keyboard, WK-225 portable keyboard, features a 76-Key Piano Style Touch Response Keyboard with 600 total onboard Tones, 180 Rhythms, and Reverb plus Chorus Digital Effects. Packed with great features such as Casio"s famous Step-up Lesson System, a 5 track recorder, audio inputs for an MP3 player and a class compliant USB port for MIDI. The WK-225 comes with an included power supply but it can run on batteries if you d like to take your music with you. All this makes WK-225 more powerful and expressive than anything like it. Product Specifications Number of Keys 76 Keys Maximum Polyphony: 48 notes Tones/Rhythms: 600 Tones; 180 Rhythms Dementions: 47 x 6 x 15 inches Weight: 16 LBS Similar Casio Products to Consider Casio WK7500 PPA Premium Keyboard Package with Audio Technica Headphones, World Tour Keyboard Stand, and Power Supply -- The Casio Casio WK7500 76 Key Workstation Keyboard offers powerful and extensive features at a price that is unheard of in the portable keyboard market. It offers 800 world-class tones, 250 preset rhythms, 17 track sequencer, 32 channel mixer, as well as audio recording capabilities. Any piece of music you create can be recorded as an audio file on an SDHC card. 9 sliders extend your versatility and provide an impressive 50 drawbar organ tones. Casio WK-6500 61-Key Portable Premium Keyboard Package with Headphones, Stand, Power Supply, 6-Feet USB Cable and eMedia Instructional Software -- The Casio WK6500 76 Key Workstation Keyboard with Power Supply offers all the tools you need to practice, compose and perform. This touch-responsive, piano-style keyboard features a song sequencer, tone editor, multiple digital effects, mixer, performance registration memory, USB MIDI interface, SD card storage and hundreds of editable tones. Includes Headphones and a stand eMedia Instructional software. Casio WK-225 76-Key Touch Sensitive Keyboard with Power Supply -- The Casio WK225 76 Key Keyboard with Power Supply is a portable, touch response, piano style keyboard. The WK225 includes 600 total onboard Tones, 180 Rhythms, and Reverb plus Chorus Digital Effects. It"s also packed with great features, such as Casio"s famous Step-up Lesson System, a 5 track recorder, audio inputs for an MP3 player and a class compliant USB port for MIDI. The WK225 76 Key Keyboard comes with an included power supply but it can run on batteries. All this makes the Casio WK225 more powerful and expressive than anything like it.