The Yamaha Piaggero NP-11 gives you classic Yamaha piano tone and 61 full-sized keys in an ultra-portable package, weighing in at just 10 pounds. Operating on just 6 AA batteries, you don"t even need a power outlet to play your piano anywhere your music takes you. Yamaha has added an easy-to-use panel design with dedicated Voice-select buttons. A built-in metronome with adjustable tempo and time signature appeals to the pianist who knows that practice makes perfect.