The iSOS-309-IP65 is a waterproof light charging wireless emergency call button product with a built-in rechargeable 16340 lithium-ion battery. With SP-S2-DS dye-sensitized charging module, it can be charged under indoor light conditions and can be used continuously without replacing the battery. Through the Sub-1G RF communication interface, it can approach real wireless deployment. It provides emergency help return function and improves personal safety protection. This system is very suitable for public area construction. For example, public toilets, hospitals, nursing homes, open campuses, large parking lots, etc. iSOS-309-IP65 delivers reliable electricity and reduces the cost of wiring. Realize emergency information transmission, meet low energy consumption, wireless communication, and emergency monitoring, etc., greatly reduce the time and human resources required for system construction and maintenance.