Kensington Expert Trackball mouse USB Type-A Optical

Mouse
Movement detection technology	Optical
Buttons quantity	0
Device interface	USB Type-A
Input device
Movement detection technology	Optical
Buttons quantity	0
Device interface	USB Type-A
Technical details
Weight	12 oz (340.1 g)
Case or master carton dimensions (W x D x H)	11.3 x 11.2 x 8.6" (287 x 284.4 x 218.4 mm)
Software
Mac operating systems supported	Yes

System requirements
Mac operating systems supported	Yes
Weight & dimensions
Weight	12 oz (340.1 g)
Width	4.92" (125 mm)
Depth	5.75" (146 mm)
Height	2.5" (63.5 mm)
Packaging data
Package weight	35.2 oz (997 g)
Package width	10" (254 mm)
Package height	3.63" (92.2 mm)
Other features
Weight	12 oz (340.1 g)
USB 2.0 ports quantity	1
Package length	9.76" (24.8 cm)
Mouse dimensions (WxDxH)	4.92 x 5.75 x 2.5" (125 x 146 x 63.5 mm)
Compatible operating systems	Windows XP/Vista
Case or master carton dimensions (W x D x H)	11.3 x 11.2 x 8.6" (287 x 284.4 x 218.4 mm)
Logistics data
Case or master carton dimensions (W x D x H)	11.3 x 11.2 x 8.6" (287 x 284.4 x 218.4 mm)

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SKU	K64325	VM4SW	SSM3	VM4L	VM4R	VM4S
Manufacturer	Kensington	Evoluent	Seal Shield	Evoluent	Evoluent	Evoluent
Buttons quantity	0	N/A	0	N/A	N/A	N/A
Movement detection technology	Optical	Optical	Optical	Optical	Laser	N/A
Purpose	N/A	N/A	N/A	office	office	office
Device interface	USB Type-A	RF Wireless	USB Type-A	USB Type-A	USB Type-A	USB Type-A
Scroll type	N/A	Wheel	N/A	Wheel	Wheel	Wheel
Connectivity technology	N/A	N/A	N/A	Wired	N/A	Wired