Casio SA-50 32 Key  Mini Keyboard Keyboard & Rhythm Warriors Lessons SPECIFICATIONS: Built-in Speakers:  Yes Headphones Input:  Yes Number of Keys:  32 Polyphony:  8

Casio SA-81 44 Keys Casiotone Mini Keyboard with Piano tones, Black SPECIFICATIONS: Built-in Speakers:  Yes Headphones Input:  Yes Number of Keys:  44 Polyphony:  8