The electronic door lock, refers to uses the programmable memory and the data reading device, its key is difficult to duplicate. There is a 3 in the key. 5x3. 5mm dedicated electronic chip, with a specific password. When the key is inserted in the lock hole, the password is fed into the memory of the lock, while the magnetic field is generated and the voltage is generated in the coil of the chip, which is used as the unlocking power, and the lock is opened if the password in the key matches the lock.
Lock password can have 10 of the 13 times more than the combination, so in the next few decades can be assured of use. But can talk about some of the practical or popular or the key type of electronic password lock.