... :1. Key is TM card(ibutton /touch memory card), Management card is my company's special card, can not be copied, ... reliable.2. Set single and double cards, general card (unlock different locks)3. Testing tongue position (whether closes in place ... cards, then reset new cards), Management card(add or delete card), Manager card(general card), Waiter card, Guest cardParameter:Working voltage: DC 6V ...