The NP-30 Portable Grand delivers Yamaha digital piano sound and simplicity in a new lightweight, compact design like nothing else you've seen... all at a price point you won't believe. Its super slim design and minimal weight of 12 pounds makes it the most compact performer in the digital piano family of instruments. And 6 "AA" batteries (not included) are all you need to power up and start playing immediately. Graded Soft Touch Action Because of its similarity to acoustic pianos, a graded action is one of the primary features sought by pianists in their digital instruments. While technically a non-weighted action, the new Graded Soft-Touch keyboard is the first of its kind bringing different levels of resistance without the extra weight of moving hammers the key contributor to the NP-30's fighting weight of only 12 pounds. The end result is a very playable action that will appeal to pianists who want to take their music anywhere. AWM Stereo Piano Samples Advanced Wave Memory is Yamaha's exclusive format for reproducing sounds digitally. And stereo means that Yamaha used two microphones to record the piano you hear on every key of the NP-30 adding even more realism to the sound you hear. Built-in Metronome Every pianist knows that practice makes perfect. And one tool they've all used to keep time when practicing is the metronome. The NP-30 has a built-in metronome and even has multiple time signatures (3/4, 4/4, 6/8) to choose from. Plus the numeric key function lets you set the tempo to the exact marking you need. Dual Voice Mode Choose any two Voices you'd like to combine and play them both at once. Dual Voice mode makes this easier than ever. Simply hold down the Voice Select button and select the two you'd like to hear for a variety of combinations. Powered by 6 "AA" size batteries (not included) or optional PA-150 power supply (#330238)