VDB1506 is a safety helmet Tag, of which the main control chip uses NRF52832 to achieve low power consumption standby and broadcast information transmission. It can use our company's VG05 beacon for scanning and forwarding the tag broadcast information, including RSSI, to VDB2601 gateway to collect tag information and report to the background server to analyze RSSI to achieve positioning. It can reach 3~ 5meter accuracy in indoor positioning or existence detection. It is recommended for personnel positioning in construction sites, factories, mines and other safety monitoring occasions. The tag has a built-in accelerometer, which can switch the positioning frequency intelligently between moving and stationary ,so as to achieve a lower power consumption. It has SOS button function, which can inform the backstage monitoring personnel in time; The built-in vibration sensor can alert the wearer when an alarm is triggered or a message is sent. The tag can be re-charged by connecting the USB magnetic cable to a USB power supply, and the other side connecting to magnetic charging interface. The Built-in 1000mAh large capacity rechargeable lithium battery, can achieve more than 8 days of continuous working time. The tag’s shell uses ultrasonic pressing technology, and the button adopts 3M adhesive way, in order to achieve IP65 level waterproof design. And it is equipped with a white buckle, easy to wear.