2.4GHz RF Wireless USB Mini Keyboard with Optical Trackball and Hot Keys 2.4 GHz with 8 channels provides up to 25 ft of wireless connectivity (maybe more) Optical trackball is easy to use, two button operation. Relatively small and very lightweight for portability. 800 DPI trackball has high resolution and large enough to be easy to use. Low profile keys for comfortable typing. Windows 2000 and above Additional Details BRAND : ADESSO INC. SKU : WKB3000UB UPC : 783750003070
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