VARIOUS UNLOCKING METHODS: This home smart lock can be unlocked by , key, card and APP to ensure your free access. It is also equipped with an emergency power port to prevent the battery (not included) from running out.ANTI PEEP FUNCTION: This home smart lock supports virtual anti-snooping passwords, and random passwords are entered before and after the correct password, greatly improving security.LOW CONSUMPTION: The smart lock is designed with low energy consumption, energy-saving and durable, and strong anti-interference ability. The lock body is very strong, rust-proof, scratch-resistant and has a long service life.EASY REPLACEMENT: After the lock is damaged, just replace the lock cylinder, no need to disassemble the lock body, easy and fast installation, no drilling. Suitable for home and office.MAIN APPLICATION: This smart security lock is suitable for the installation of wooden doors, iron doors, security doors, etc. And you can view the door opening record through connection, so that you can always grasp the situation of the door. Specification Material: Stainless steel(handle), brass(Lock cylinder)Uses: Suitable for home use, hotel apartments, government unitsApplicable APP: For TTLockSuitable Door: Anti theft door, wooden doorSuitable for Door Thickness: Approx. 40mm-100mm / 1.6-3.9inLock Body: CN standard, European standard, large lock bodyOpen Method: APP, card, password, keyPassword Capacity: 30 sets of passwordsRF Card Capacity: 200Mechanical Key: Magnetic induction keyWorking Power: 3 x AAA (excluded) 3.6V-5VAlarm Voltage: 3.6VEmergency Power Supply: MicroUSBStandby Current: <10uAWorking Current: <135mAAdapt to Temperature: -20℃-70℃Installation Time: No drilling, no need to replace the lock body, installation time < 5 minutes Package List 1 x Door Lock 2 x Key 1 x Sucker 3 x IC Card 1 x Screwdriver 1 x Instruction How to Use ​​1. Remove the original lock cylinder: Use tools to unscrew the old lock cylinder fixing screws, remove the original mechanical lock cylinder (for upgrades) and screw the lock body, front and rear panels, and side panels (for new installations) 2. Handball after removing the smart lock cylinder: Use the equipped special tool to remove the handball after the smart lock cylinder 3. Install the smart lock cylinder: Install the smart lock cylinder into the front panel and adjust the position according to the lock cylinder fixing screws 4. Install the smart lock cylinder fixing screws: Install the mechanical core fixing screws 5. Handball after installation: (1). Reinstall the rear handball and use special tools to tighten the screws. (2). Use the rear handball to test whether the smart lock cylinder is installed correctly, and check whether the rear handball can open the door normally. 6. Install the battery (1). Take off the front acrylic plate of the front handball, and use a special tool to remove the battery cover. (2). Put 3 x AAA standard batteries (excluded) in the battery box, pay attention to the direction of the positive and negative poles of the battery, and the spring end is the negative pole (3). Install the electric ground cover, tighten the battery cover screws, and replace the front acrylic plate.​