The DHI-HY-L121 LoRa Manual Call Point (hereinafter referred to as thedevice) is designed to integrate with the automatic fire alarm systemthrough the DHI-WG-1037 Wireless Gateway. When a fire is detected,it sends fire alarm signal to the Fire Alarm Controller after the buttonis pressed. Then, the controller integrates with sounder strobe to sendout an audible and light alarm signal to warn people in field whenfire occurs.It is suitable for dormitories, shopping malls, school buildings, officebuildings, factories, and other manned places.