RJ45 is a kind of information socket connector in wiring system. The connector is composed of plug (connector, crystal head) and socket (module). The plug has 8 grooves and 8 contacts. RJ is short for registered jack.
JLY proviedes many types of RJ45 cover, for example, we have rj45 boot cap, rj45 boot connector cover and rj45 protective covers for plugs.