The new model of Avent Security Password Door lock D500 now is upgrade in 2017. The new D500 still use the password as the main key. The new D500 use the Zinc Alloy as raw material. Zinc Alloy is purposely designed to absorb more energy without breaking and more finish. The new D500 also available for the glass door. The high quality black touch screen keypad area coincided with the card reader area, which can save the space, keep the design simple. When you input the password, you can add any number before the real password, which can secure you better. Now the lock is up to 30 different users. The administrators can add different general users as well. The D500 is decided for the glass door. 10 ~ 12 mm thickness door can be applied. The D500 can automatic locking and unlocking the door. The lock is driven by a motor, so it made it easier for the glass door. The D500 also have been specially designed. The size of the D500 front plate is 67x226x26 mm. This size of the Zinc forging casting is suitable for the glass door. The D500 use 4 pieces of 6V batteries. The batteries can provided 3,000 ~ 6,000 times to unlock the door. When the 4 batteries run off, there is a 9V battery backup power support can be used. The 9V battery can be charged on the ports to give the lock a temporary power for unlocking. The D500 also have the low battery alarm. When the batteries run off, the low battery alarm will active automatically. Another notification is the wrong password alarm. The wrong password alarm will active when the users input the wrong password. This action can protect the lock better.