When was the first wireless mouse made?

The first true wireless mouse device was the Cordless MouseMan (1991), produced by Logitech. It used radio frequencies to transmit information to the receiver in the computer. Along with the development of optical tracking technology that replaced mouse balls, the wireless capability of computer mouse devices continued to evolve. In 1999, Microsoft released the Cordless Wheel Mouse, which featured optical sensors. Armed with long-lasting batteries and unparalleled accuracy, the wireless mouse soon gained in popularity, and other manufacturing companies quickly released their own versions. Now, people don't even need a computer mouse pad to operate a mouse, and they can use mouse devices almost anywhere.