1、Adopts four levels of management, can work with 3 principal cards, 1 management card, 20 waiter cards and 1 guest card. 2、The management card is the first card in the induction, with the function of setting and deleting, can used for directly unlocking. (has been setted at the factory). 3、The management card should be kept properly, if the management card is missing, all information needs to be reset. 4、Support low voltage alarm, if the power of the cabinet door lock is too low to open the door, can connect the panel to external power box, get charged for opening. 5、Single card door opening mode, management card induction 1 times, guest card inducts when the blue light flashes, and after the flashing stops, the guest card can open the door. 6、If the management card sets a new guest card, the new guest card can open the door, and the previous one's door opening function will be automatically cancelled. 7、Dual card door opening mode, use the management card to sense 2 times in a row. When the blue light flashes, the waiter card is sensed. After the flashing stops, the door can be opened with the guest card and the waiter card. 8、If you need to set multiple waiter cards, you need to set them continuously after 2 ticking of the the management card. Long standby time, up to 1 year, with small lock tongue anti‑pry alarm function. 9、Use the management card to sense 4 times continuously. When the blue light flashes, the main card is sensed. After flashing stop, the main card can be used to open the door, which can be set according to your needs.