Product Description Magnetic Coupling Structure: For the first time, LAUTIE integrates the magnetic coupling principle into a product. This design enables the inner and outer rings to rotate simultaneously but in opposite directions. A gentle spin of the outer ring triggers the inner ring to rotate at five times the speed, mimicking the smooth motion of a bicycle gear system.Rich Tactile Feedback: The innovative magnetic coupling structure offers a unique and satisfying tactile experience. As you spin the outer ring, you’ll feel a silky smooth rotation, complemented by non-linear damping feedback. It’s as addictive as using an old rotary phone – once you start, you can’t stop!Quick-Release Design: The Carnival-Mega features a magnetic quick-release design that reduces the need for screws. This makes assembly, disassembly, and maintenance easier and more efficient. Specifications Brand: LAUTIEWeight: Brass: 340.6g, Zirconium: 312.5g