Feature:1. UNIQUE CREATIVITY: The exquisite kinetic art perpetual motion machine design allow you to feel the glamour of art in play and viewing, bring a lot of fun2. STRESS REDUCTION AND RELAXATION: Gently rocking kinetic art perpetual motion machine ornament can relieve stress and bring you a relaxing and peaceful experience3. FINE WORKMANSHIP: Kinetic art perpetual motion machine desk toy is made of excellent plastic, ABS, stainless steel materials, long lasting with rich texture, suitable for long term use and display4. OPERATING PRINCIPLE: Rolling ball perpetual motion machine through the principle of dynamics, the decoration automatically continuous motion, intoxicating5. HOME DECOR: Not only a circular stress relief toy, but also an elegant home decor that add an artistic ambiance to your space, beautiful and practicalSpecification:Item Type: Kinetic Art Perpetual Motion MachineMaterial: Plastic, ABS, stainless steelBattery Type: Built in lithium batteryBattery Capacity: 1800mAhWeight: Approx. 640.00g / 22.58oz.Package List:1 x Perpetual Motion Machine10 x Steel Ball1 x Charging Cable1 x User Manual