Here's the description from the ad:
YOU CAN TAKE IT WITH YOUHOHNER PIANET TFor the traveler, Hohner's Pianet T ‒ a compact electro/mechanical piano weighing just 38 pounds. The keyboard has 60 standard size piano keys for a five octave range. Amplified headphones permit private listening, and the Pianet T requires no batteries or electric power. Retails for about $650.
