Amazing New Voice Recognition Technology Maestro Mouse really understands you as you control your tree lights and musical light show. Songbook ornament hangs on your tree with Maestro Mouse responding to "Hello Mr. Christmas" and numerous other song requests and interactions. Unit is designed to control your existing tree lights (pre-lit, LED, incandescent, etc.) Includes 24 songs (12 from the songbook and 12 from memory)and multiple settings. Patent pending. UL listed indoor.