Error prevention key for Bluetooth communication

The utility model discloses an error prevention key for Bluetooth communication, which comprises a shell, a six-pin plug, a circuit board and a battery. The six-pin plug is arranged outside the shell; the circuit board and the battery are arranged in the shell; the circuit board is provided with a processor unit, a unlocking/locking control unit, a Bluetooth communication unit, a power management unit and an instruction unit; and the six-pin plug is connected with the circuit board through a key connecting wire. The utility model matches with the pocket personal computer, and is used for transmitting the state of the equipment or lock to the pocket personal computer via Bluetooth communication and receiving unlocking-locking commands, and the pocket personal computer feedbacks the real-time operating information to the error prevention host via the GPRS network, so that the host can monitor the operating process under the condition with the real-time online operating process.