Features: Made of high quality plastic, not easy to age, durable and reliability, with long serving life. Low cost real trackball works with any PC application. Can be used on a PC as a mouse or connected to your game console. This LED trackball mouse features with smoothly trackball rolling action. This trackball mouse size is unified in the game console, which can satisfy the design of various game console.Specifications: Material: plastic, meta Mouse size: approx.10 * 10 * 4cm/3.94 * 3.94* 1.57inchDiameter of track ball: approx. 4.5 cm/1.77inch Network interface: wire Connection method: wire Package Included: 1 x LED trackball mouse 4 x Screws Note: 1. The product you received can be installed by yourself. 2. Due to manual measurement, please allow 1-3cm error, please make sure you don't mind before ordering. 3. Due to different monitor, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Does not connect as a mouse , please take nocite. If you think Trackball does not move smoothly. we can refund full meney to you, Wasn't able to play retro arcade games. Does not connect as a mouse - no function on the PC or Raspberry Pi