Kendal Electronic Keyless Deadbolt Door Lock Unlock with code, mifare cards, and mechanical key S200MF-1 Keyless entry providing enhanced security. 3 Unlock options: code, mifare cards, and mechanical key. Can be used with doors that are either right hand open or left hand open. Standard single latch. 200 independent user codes(6digit)& the ability to quickly add or delete each user individually. Made of stainless steel. Anti-static. Weather resistant. Keypad illuminates you can see it at night. Easy installation, driven by 4pcs AA (not included). Package includes 2 keys and 2 mifare cards.