The Casio CTK-2400 is a 61-key portable keyboard ideal for beginners. It features 400 AHL sound source tones and 150 rhythms, offering diverse musical exploration. The 48-note polyphony allows for richer playing. Its Step-Up Lesson system aids learning with various modes and evaluation. A unique sampling function via a built-in mic enables sound capture and playback through Voice Pads. Other features include a metronome, LCD display, transpose, and USB connectivity. It's powered by AC adapter or batteries and has built-in speakers. Its compact design and learning tools make it a great starting instrument.