Features

• High quality mini keyboard
• 47 Voices (instruments)
• 74 sound effects
• Quiz mode - Guess the sound!
• 28 auto accompaniment Styles and the Smart Chord function
• 30 onboard Songs
• Free digital songbook
• Light and compact
• Built-in speaker / Headphones jack
• Battery and USB bus powered (USB power adaptor is sold separately)

More Info From Yamaha:

https://ca.yamaha.com/en/products/musical_instruments/keyboards/portable_keyboards/pss-e30/index.html