Patent ID: 8905653

Claim:
An adapter comprising: a plug connector comprising a first housing defining a first mating port, and a plurality of first terminals disposed in the first housing; a receptacle connector comprising a second housing defining a second mating port, and a plurality of second terminals disposed in the second housing and electrically connecting to the first terminals, the second mating port defined at a rear end of the second housing, the second housing defining a retaining cavity extending forwardly from the second mating port, an inner wall of the retaining cavity has a pair of guiding slots; and an optical device comprising a first optical module and a second optical module optically connecting with each other via optical fibers, the first optical module movably retained in the first housing, the second optical module immovably retained in the second housing along a mating direction of the receptacle connector, the first and the second optical modules having lenses exposed to the corresponding first and second mating ports, respectively, the second housing has a pair of guiding arms engaging with the pair of guiding slots to retain the second optical module into the retaining cavity conveniently.