SolidTek Compact Low-Profile Computer Keyboard (PS/2, Not USB to Save Slot). High-End Scissor Switches Give Quiet Office Operation & Long-Life. Plug & Play Windows Compatible. Inexpensive yet Durable. PS/2 CONNECTION NOT USB. This keyboard plugs into the round purple hole. It DOES NOT use USB (the rectangular, flat connector). LOW-PROFILE KEYS provide quiet, quick, and comfortable typing. HIGH-END SCISSOR MEMBRANE SWITCHES rated at 5 million cycles. SLIM, COMPACT LOW-PROFILE DESIGN for space and typing efficiency (104 keys). SAVE EVEN MORE  Also available in money saving 5 Pack (Amazon ASIN B01I5HDSGC ) and 15 unit business value pack (Amazon ASIN B01I5FY386 ). Just paste the ASIN into search bar.