When this small electromagnet is not energized, the iron core inside can be taken out, so please be careful not to lose the iron core. At 6V power, if a large part of the iron core is sticking out, it will be sucked in. At this time, it is not easy to pull out by hand; 12V power is even greater. We estimate the voltage range is 6 to 12V. One end of the iron core is provided with a slot, and it is estimated that it is designed to be used for latching, which may be used for electronic locks.