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Model: SPSM-300A     Brand: SY     Country of Origin: Made In Hong Kong     Product Description: Model: SPSM-300A Interface: PS/2 Resolution: 800dpi Speed: 21 inches/sec Frame Rate: 3000 frames/sec Butto...

Product Description: 1. Functions The functions are described as follows: A. When the switch is placed in the “keyboard” end, the pointer has some functions that the keyboard has. The functions are described as follows: ...