Interface: USB.
		Structure: Optics.
		Speed: USB 1.1/2.0 Full-speed.
		Report-rate: Can get up to 500 times/sec.
		Offer 6 keys and 2 switches can be free design of customer.
		Standard 3 keys: Compatible with Microsoft 3 keys mouse.
		Extra 3 keys: CPI key is for changing 400 or 800 CPI , Scroll up/down keys are for control Microsoft scrolling (Z axis).
		Extra 2 switches: SW1 is control the ball of module is trackball mode or ball mouse mode , SW2 is control the ball of module is cursor mode or imitate mouse wheel mode.
		The function of SW3 / SW4 is RB or LB, depend on the change of SW1.
		Module CPI default can select 400 or 800 CPI.
		Module direction default can select 0 degrees or +90 degrees.
		Do not need to install any driver.
		Compatible OS: Windows 98/ME/2000/XP/Vista.
		Power Supply: 4.75~5.25 VDC , 100mA.
		Module Size: 30(L)*26(W)*16.43(H) mm.