Thanks for the reply. So what is the way get a duplicate card for my lock? The lock is from Digi lock company Room 7B, 7/F, San Xin Mansion, No.33, Huangpu Road West, Tianhe District, Guangzhou, 510620 China. They had provided 3 cards. One is Setting card, Reset card and the Guest Card. Now the guest card is almost used too may times and i want 1 or two clones of that. Or they told me that they have a software by which i can produce my own cards. But the software costs more than the lock.