Four PCs share one RJ45 device such as ISDN, high speed internet cable & DSL modem, or vice versa. It is fully-wired to support all RJ45 datacomm applications and is guaranteed up to 10,000 switching cycles. It has heavy duty sealed rotary switch to prevent dust and moisture, gold-plated contacts and 5 Year Warranty. (Connectors: 5 RJ45 Female)