Product name: Perpetual motion ornaments Applicable scene: home decoration, birthday gift, party decoration, etc. Note: This product is noisy, if you mind, please 't buy it Product style: Usb rechargeable model(The product comes with a battery, the product is rechargeable,The battery capacity is 1800mA, it can work for 4~5h when fully .) color:Wood grain Material:plastic size:150 x 100 x 150mm Package Contents: 1 x perpetual motion ornament 1 x USB cable 5 x steel ball 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.