<b>(1)</b> The music box is made of Acrylic. It is a clear music box.<br><br> <b>(2)</b> It is with a wind up 18 note musical movement, the movement is made by Sankyo from Japan with golden color plated, the second famous musical movement supplier in the world.<br><br> <b>(3)</b> Each music box only plays one melody, and it will play about 15 to 20 seconds of the part of the melody you choose. <br><br> <b>(4)</b> it will be working about 2 to 3 minutes after winding up 4 rounds through the key. <br><br> <b>(5)</b> The Net weight of music box is about 105 grams (3.70 oz).<br><br> <b>Size:</b> <br><br> Length 6.20 cm (2.44 in) <br><br> Width 5.20 cm (2.05 in)<br><br> Height 3.80 cm (1.50 in)<br><br>