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Personal computer camera Port:ps/2 usb u+p Dpi:400/800 dpi Material:abs Box size:20*18*5cm Ctn size:52*37.5*42cm Amount:40 pcs Weight: Scan speed:1500-3000/s Wheel life:100000 Mouse life:3years Key life:1500000 E.L:100000 20*18*5