Here comes a new wireless trackball mouse from Evergreen, the DN-69528. Powered by a single AAA battery, the mouse features a 2.4GHz radio frequency (works up to 10 meters), a built-in trackball, a scroll wheel, a 400/600/800/1000dpi resolution (switchable) and a tiny USB receiver. The DN-69528 is priced at 3,999 Yen (about $51). [Product Page]