SLEEK, SOPHISTICATED DESIGN: The Swinging Sticks Kinetic Energy Sculpture seemingly defies gravity as the double pendulum creates a fluid, relaxing rotation designed to change speeds and direction for no apparent reason. This high-quality, museum-style motion sculpture gives the illusion of perpetual motion designed to baffle and amaze all onlookers. Hand assembled by experienced engineers. BEAUTIFUL ART: Perfect for any environment, The Swinging Sticks is perfect for conference rooms, offices, waiting rooms, display windows, and foyers. This sculpture will provide relaxing entertainment and be the center of attention no matter where. HOW IT WORKS: Powered by 4 AA batteries (not included), the aluminum sticks revolve in a mysterious, perpetual motion, creating an entertaining hypnotic effect. NEVER-ENDING: Continuously rotating, The Swinging Sticks is designed to remain in motion unassisted. The constant, fluid motion is designed to appear like the sculpture is changing speeds and directions while continuously rotating. QUIET: A beautiful piece of art, this kinetic sculpture operates nearly silent and is well recommended for quiet office. A small "tick" sound may be heard at a very low volume. Colour:As Shown Material:aluminum alloy Package Contents: 1 x Desktop Toy 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.