By interlocking with safety sensors and measurement equipment, the danger signal of safety sensors and the alarm output of measurement equipment are transmitted wirelessly, and alarms are sent directly to the wristwatch-type receiver worn by operators and workers, or to the helmet-type receiver. It is a system that can communicate.

The wristwatch type receiver can be linked with various sensors such as "sound", "vibration", and "text" to notify the alarm, and the helmet type receiver can notify the alarm by "vibration" and "sound". Therefore, it is possible to use it according to the needs of the site and improve the safety of workers.