Features: ☆Encrypted Password The password is encrypted, which enhance security for the Users. ☆Convenient and Secure Operation (TM Key) Use American DALLAS Company抯 TM Card, which has the function to keep from Copying and detecting. This lock is convenient to operate by one touch operation. ☆Emergency Opening (Mechanical Key) User can Mechanical Key to open the door in case of emergency which increase security ☆Remote Control The door can be unlocked by remote control inside the room. And the distance is from 0-20m. ☆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 in case of entering wrong passwords in 5 consecutive times. ☆Dual Security Mode: Users can choose the Dual Security Mode. In such Mode, only both use TM Key and Digital can open the door. ☆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. ☆Incorporated with a ring bell There is a ring bell on the outside body of the lock which provide convenience for the Users. ☆Networked Function It has networked function that can connected to the Residential Management Dept. This provides more security for the Residential. Specification: ☆Material: Cast-steel; Cast-iron ☆Dimensions: Outside Unit 61(W)?98(H)?0(D) (mm) Inside Unit: 75(W)?98(H)?0(D) (mm) ☆Working Voltage: Battery: 4 X 1.5V(AA) batteries ☆Registered TM Key: Totally can register 10 TM Key ☆Battery Life: More than 4000 times of use ☆Installed Door: Wooden door, Steel door, Burglar Door ☆Thickness of Door: 40-60mm (if a special thickness, please preconcert) ☆Color: Sliver gray, Golden