number keypad sliding door lock

sliding door lock with number keypad    

sliding glass door key locks
1.no batteries needed
2.Change the code at will,easy change code  
3.open by code or mechanical key
4.waterproof panel, can use outside door 

2 ways to open lock: password code or mechanical key, even if you forget to take the key, password code can open lock, or if you forget password code, machanical key can open lock emergently