Trackball mouse with scroll ring, comfortable and accurate. Made of high-quality plastic, it is not easy to age, durable and reliable, and has a long service life. Low cost real trackball for any PC application. This LED trackball mouse does not require batteries. Can be used on a computer as a mouse or connected to a game console. This LED trackball mouse features smooth track scrolling action. The size of this trackball mouse is unified in the game console, which can meet the design requirements of various game consoles. Suitable for right- and left-handed users. Colour:blackMaterial:plasticPackage Contents:1 x Arcade Trackball Mouse4 x Screws(Accessory screws may be different, don't accept the specified)Only the above package content, other products are not included. Note: Light 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.