About Buff Coin Compound Play Modes: It has three track structures including an internal striking groove, a mechanical bead groove, and a vibration groove. It supports two core modes, magnetic vibration and striking. Coupled with a rich combination of shutter sound effects, it allows for smooth, crisp, and silky feedback switches. Smooth Structure: Equipped with precision bearings, with light damping adjustment and zero clearance in the whole machine, it remains smooth and durable for long term playing. It adopts a magnetic quick release design, enabling disassembly and assembly in one second, and easy replacement of accessories. Material & Craftsmanship: The main body is made of a composite material of PLA + stainless steel. With high precision fine printing technology, the surface texture is so delicate that there are almost no visible patterns, and the materials used are solid. ❣️ Tips 1. This is a 3D-printed product. Although we have adopted more advanced techniques, there may still be layer lines and slight processing marks on the surface. Perfectionists should purchase with caution. 2. There will be a printing seam ("Z" Seam) at a certain position on the edge of the product, which is not a quality problem. 3. The product you receive is new. It needs to be used for 1 - 2 days to be broken in for better feedback. 4. The packaging of each batch may vary. Those who mind should think twice before placing an order. 5. This type of product is not suitable for children under 14 years old.