The E3 VTG Rare 1989 HEADSTART Explorer Mouse is a vintage trackball mouse featuring a unique 3-button design with a 9-pin connector. Made by Headstart, this gray mouse offers a maximum DPI of 1500 and connectivity options including PS/2, wired USB, and programmable buttons. It is designed for right-handed users and includes ergonomic features like a grip, thumb button, scroll wheel, and LED lighting. Perfect for retro computer enthusiasts or those looking for a unique and reliable mouse option.