multifunctional 61 key piano: 61 keys + charge function + dual speaker + recording + volume + display + microphone + music stand + 100 rhythms +10 Demo Songs +5 animal sounds(The microphone and ...

There are other, smaller keyboards or synthesizers that have fewer keys – most come in increments of 25, 32, 49, 61 or 72 keys. According to Yamaha, the reason for the 88 keys has to do with the ...