☆Opening by Password User can open the door by password. ☆ Convenient Operation (TM Key) The system is controlled by one touch operation (touch key) ☆Self-Diagnosis The system has a self-control function to notice by indication lamp on system error. A : In case the dead bolt does not move back and forth normally B : In case the system is dual locked from inside C : In case more than 80% of the battery power is used up D : In case of entering wrong password ☆Simple Operation All functions are informed by melody sound and user can operate it easily without User抯 Guide. ☆Strong 12-key Buttons The 12-key buttons are designed to resist the external shock. ☆Emergency Battery Terminal When the battery is run out, user can open the door using the emergency battery terminal. ☆Prevent from Compulsive Opening When the door is opened abnormally, the system warns an alarm. ☆Password / Touch Key Memory Function User抯 password and touch key data information will not be erased even though the battery is run out. ☆Power Cut-Off Function The power will be cut off for 30secs in case of entering wrong passwords in 3 consecutive times. ☆Dual Security Locking Function Permanent locking switch is located on the inside unit and provides more strengthen safety. ☆Low Battery Warning Alarm When the unit makes beep sound, replace old battery with new one. ☆ Unlock by Remote Control Users can unlock by Remote Control inside and the distance is from 30-50m.