Apple Wireless Mouse (original, A1015, 2003)

Apple’s first cordless mouse was the Apple Wireless Mouse, a Bluetooth version of the white Apple Mouse. The Apple Wireless Mouse used Bluetooth 1.1 and shipped with two 2 AA lithium (non-rechargeable) batteries. This mouse had a power switch on the bottom that slid to protect the optical sensor when the mouse was not in use. 

Although based upon the Apple Mouse, the surface of the mouse was opaque white, rather than the transparent acrylic used in the wired version. Like the wired version of the mouse, the entire surface served as the clickable single button.

Source: Wikipedia.com