SMART KEY DEVICE

A smart key device includes a battery, a wireless charging module, a sound output component, a distance measuring module, and a control module, wherein the wireless charging module is electrically connected to the battery, and the control module is electrically connected to the wireless charging module, the sound output component and the distance measuring module. The wireless charging module receives power and provide power to the battery. The sound output component is enabled by a first enable signal to output a sound prompt. The distance measuring module is enabled by a second enable signal to perform distance measurement. The control module includes a Bluetooth transceiver and a microcontroller, wherein the microcontroller generates the second enable signal when the Bluetooth transceiver receives a pairing signal and generates the first enable signal when determining that the measured distance is less than a preset distance.