The present invention comprises a plug-bolt set with a circuit board and a detection antenna on a bolt-piece and a lock-seat set with a main antenna. The circuit board is set with a chip, a main circuit, and a secondary circuit. When the lock-seat and the bolt-piece are engaged and locked; the chip, the main circuit, and the main antenna are electrically connected to emit a first signal for providing the identification host to monitor, and controlling the secondary circuit to be electrically connected with the chip and the detection antenna to emit a second signal. The second signal can be used for the mobile phone software to do the quality control of the first signal. The first and second signals can be cut-off simultaneously when the plug-bolt is broken. This allows the end customer to do the actual test and quality control using the mobile phone.