Very bad quality made, especially the sound. Amazon promptly refunded me several days later. I PERSONALLY USED EITHER A CLEAR WAX TO SEAL THEM IN THE BOTTOM OF SOME UNEVEN PILLAR CANDLE BOTTOMS, THEN USED A CHEAP SCHOOL ELMERS GLUE ON INSIDE OF MOLDS TO CREATE A GLOWING EFFECT AND DIFFERENT DESIGNS, ENSURING THEY WERE FAR AWAY FROM THE WICK. ?? The only thing its good for is firmware updates which took about 15min. I play drums and have a Mackie Thump 18inch sub For my Roland kit. Had obviously been used It is a quality product, great price point and works really well. Io mi sono trovato molto bene. Note that I use a "close-mic" configuration, where the mics are under the piano. Its good quality with super space save.