The invention discloses a wireless communication device of a variable device. The structure of the wireless communication device includes a prompt light board, an earphone shell, a transmission distance warning device, an external ear hook, a dustproof plug, and an earplug. The back of the prompt light board is mounted on the front end face of the earphone shell in an inlaid manner. The transmission distance warning device is mounted in the earphone shell in an embedded manner, and the bottom end is mounted on the top end of the earphone shell in an embedded manner. The back of the dustproof plug is mounted in the earphone shell in an inlaid manner. One end, being far from the prompt light board, of the earphone shell is mounted in the earplug in an embedded manner. The wireless communication device mainly uses a micro-vibration prompting mechanism and a light connecting mechanism to cooperate with each other and performs triggering through a variable component conveying mechanism so as to prompt a user the position of a signal source. The user determines coverage distance of the signal source through the micro-vibration prompting mechanism and the light connecting mechanism in theuse of a wireless earphone, and a signal source transmitter, such as a mobile phone, can be found to be stolen in time.