A male connector assembly is plugged into a female connector. The male connector assembly includes a male-head connector and an antenna. The male-head connector includes an electrical connection part and a covering body. The covering body is arranged at a first side of the electrical connection part. The antenna is arranged inside the covering body. The male connector assembly is connected to the female connector, and then the female connector transmits a wireless signal to the antenna. The antenna transmits a back-pass signal to the female connector after the antenna receives the wireless signal. Data is transmitted between the male connector assembly and the female connector when the back-pass signal is verified correctly by an electronic product electrically connected to the female connector.