Store call system

This device supports busy store staff in responding to customers by allowing them to call for assistance from the shelves or communicate with each other in stores such as drugstores, home centers, and supermarkets. By connecting the receiver to the existing broadcasting system, it enables announcements to be made through in-store broadcasts from transmitters installed within the store. Additionally, the voice messages are created using voice synthesis software, producing high-quality sound that closely resembles natural speech. Furthermore, the voice messages can be easily changed by simply swapping out the SD card inserted into the receiver.