The Yamaha Piaggero NP-15 keyboard features 61 full-sized, touch sensitive keys and classic piano tone with an ultra-portable and light-weight design. Built-in speakers and battery power option make the NP-15 your musical companion anywhere you want to go. Use the Smart Pianist App for iOS devices to make navigating and configuring the NP-15 easier than ever, practice along with the built-in metronome or just play for fun. The NP-15 comes with a power adapter included.