... please read the introduction seriously and keep it. ELB firing system uses 220 V alternate current, with “TEST” function ... group ignite 25 pieces at the same time. A, usage elucidation:1,Put the products into red/ ... connection;2,Connecting a 220 V alternate current directly.3,Checking 1-2 firing systems to see ... 4.If it’s the 4 groups or upwards firing system, Place the switch on ”TEST” position, if ...