The calling system can send different types of dispatching instructions, which can define different calling requests. The buttons can have the function of starting a job, canceling a job, or displaying multiple statuses. Support for built-in power with a lithium battery that is replaceable and lasts up to 30 days. The calling system has DC power support. It is possible to choose different numbers of buttons according to customer needs. Call buttons are suitable for AGVs, robots, workshop production lines, automation devices and other cases requiring instructions based on wireless communication.