Ningbo Kingdun Electronic Industry Co.,Ltd., established in 2000, is an experienced Wireless Online Smoke Alarms Manufacturers, professional Custom Wireless Online Smoke Alarms and other safety alarms, We have 8 SMT lines and 4 automatic communication Hole production line, 8 final packaging lines and 1 automated injection room. All our Wireless Online Smoke Alarms and other alarms are 100% calibrated and controlled under our efficient ISO-9001 quality system.