Features 1、【Double Anti-Theft Smart Lock】: This smart lock offers double security with its invisible anti-theft lock and mechanical lock. It/u0027s suitable for various types of doors and can withstand an impact of up to 1000KG, providing robust protection for your home. The lock can be unlocked using a remote control, app, BT, manual rotation, indoor button, or emergency mechanical key. 2、【App and BT Unlocking】: The lock features low-power BT technology, allowing you to conveniently unlock the door using a mobile app. It also comes with four remote controls for added convenience. The electronic keys provided by the app can be set with a specific validity period (start time - end time), ensuring access control. 3、【Remote Key Distribution】: You can remotely send electronic keys to tenants at any time and flexibly set the validity period for each key. You can also freeze/unfreeze electronic keys as needed, providing you with full control over access to your property. 4、【Unlocking Record Monitoring】: All unlocking actions via the app are recorded. Once the lock is connected to the network and syncs information, all unlocking records can be viewed on the administrator/u0027s app. This feature allows you to monitor access to your property effectively. 5、【Smart Power Management】: The lock features smart power management, offering over 365 days of standby time. It also has a low voltage alarm that alerts you when the battery needs to be replaced. If the battery is not replaced, the lock will still function for a month but will eventually be unable to lock. Features: 【Double Anti-Theft Smart Lock】: This smart lock offers double security with its invisible anti-theft lock and mechanical lock. It's suitable for various types of doors and can withstand an impact of up to 1000KG, providing robust protection for your home. The lock can be unlocked using a remote control, app, BT, manual rotation, indoor button, or emergency mechanical key. 【App and BT Unlocking】: The lock features low-power BT technology, allowing you to conveniently unlock the door using a mobile app. It also comes with four remote controls for added convenience. The electronic keys provided by the app can be set with a specific validity period (start time - end time), ensuring access control. 【Remote Key Distribution】: You can remotely send electronic keys to tenants at any time and flexibly set the validity period for each key. You can also freeze/unfreeze electronic keys as needed, providing you with full control over access to your property. 【Unlocking Record Monitoring】: All unlocking actions via the app are recorded. Once the lock is connected to the network and syncs information, all unlocking records can be viewed on the administrator's app. This feature allows you to monitor access to your property effectively. 【Smart Power Management】: The lock features smart power management, offering over 365 days of standby time. It also has a low voltage alarm that alerts you when the battery needs to be replaced. If the battery is not replaced, the lock will still function for a month but will eventually be unable to lock. Specifications: Remote Control Distance: within 20m/65.6ft in an open environment, and within 10m/32.8ft outside the door Receiving Frequency: 433MHz Lock Battery: 4 AA battery (4.5V) Remote Control Battery: button battery Working Environment Temperature: -10C~50C (without icing or frost) Working Environment Humidity: 5%~70% (non frost state) Product Material: Zinc alloy Product Size: 160*88*51mm/6.3*3.5*2inch Board Size: 90*25mm/3.5*1inch Remote Size: 60*30*12mm/2.4*1.2*0.5inch Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Please allow slight manual measurement deviation for the data. Package List: 1 * Lock Body 1 * Enhanced Antenna 1 * Screw 1 * Pack Bottom Plate Fixing Screws 1 * Pack Screws 1 * Electric Screwdriver Head 1 * Small Drill Bit 4 * Remote Sending Remote Control 2 * Positioning Ring 4 * AA batteries (not included) 1 * Instructionsk Bottom Plate Fixing Rivets 1 * Pack Bottom Plate Fixing Screws 1 * Pack Screws 1 * Electric Screwdriver Head 1 * Small Drill Bit 4 * Remote Control 2 * Positioning Ring 1 * Instructions Package List 1 * Lock Body 1 * Enhanced Antenna 1 * Screw 1 * Pack Bottom Plate Fixing Screws 1 * Pack Screws 1 * Electric Screwdriver Head 1 * Small Drill Bit 4 * Remote Sending Remote Control 2 * Positioning Ring 4 * AA batteries (not included) 1 * Instructions