Specification: Material: PlasticMetal Product size: 15*15*10cm Color:Yellow/Red/Wood Grain Packing list: Electronic Perpetual Motion, steel ball,USB charging cable Kinetic Art: The Marble Perpetual Machine is a very unique toy/decorative gadget. CREATIVE GIFT: Surprise your friends with this clever toy and make them scratch their heads. Everyone will love it. Material: Wooden parts are made of high quality wood. The wires are made of stainless steel. Desk Decor: Show some personality and express your love of science and physics by decorating your office space. Can also be contemplative and fun to watch Education and Elegance: A Visual Display of Experience Power. Use it in the classroom and share the exciting world of physics and science with your friends and family Instructions for use 1. Charging status: 5V 1A full charging time is 2.5-3.5 hours based on 1A 2 Working status: continuous work for 2.5-3 hours, it will automatically shut down when the battery is dead 3 Power on and off status: Touch the circle position of the face shell with your finger to start the power on, and then press it to power off 4. Automatic detection status: when the iron ball is not detected for 60 seconds, it will automatically shut down 5. The power of the finished battery is about 70%. Consumers are reminded to fully charge the product before using it.