Alesis Harmony 32
https://www.alesis.com/products/view2/harmony-32
FEATURES
32 mini piano-style keys with built-in speakers
300 built-in tones
Accompaniment mode with 300 built-in rhythms
Play along with 40 demo songs or record your own
1⁄8” headphone jack mutes speakers for private practice
USB-MIDI connection for power and/or use with educational software
Optional Battery Power via 4 AA Cell Batteries (not included)