Four PC share one printer or one PC access four printers. It is fully-wired to support all serial or parallel applications and is guaranteed up to 10,000 switching cycles. Works with most parallel printers except inkjets and some high speed laser printers. This premium manual switch has metal case, heavy duty sealed rotary switch to prevent dust and moisture, gold-plated contacts and 5 Year Warranty. (Connectors: 5 DB25 Female)