Perpetual motion instrument is a kind of magnetic force which is transformed from direct current input through transformation, and it automatically swings by using the function of positive and negative energy conversion. Metal texture, refraction flashing, visual impact, good . Four kinds of perpetual motion instrument metal ornaments with different shapes are the for your . Using four No.5 batteries can make the celestial Track move forever. Modern technology combined with , the overall shape is elegant and beautiful, with diverse styles and necessary decoration. Describe Name: fan-shaped perpetual motion machine table ornaments Material: ABS+metal Quantity: 1pc Model: C-Dolphin Matters need attention: Due to transportation reasons, the products are delivered without batteries. Color: Silver & Black Package Contents: 1 x artifacts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.