1、AES key technology is safer than a physical key and no a key required. You can create a virtual key for your family or guests, valid for several weeks, hours, minutes, or even a specific date and time. 2、Can also remove the guest's permission to immediately open the door. You can see entry and exit records, the exact time of entry and exit. 3、This Bluetooth lock not only supports bluetooth unlocking, but also saves the password unlocking method, which greatly facilitates users who do not have smart phones, such as older children and women, or scenes that do not carry a smartphone, such as a morning start, or turn off the phone. 4、For temporary invitations, you only need to send the key to a friend, family member or hourly employee. Do not worry that they cannot enter your room if you are not at home. 5、Channel mode can be set at the time of gathering, not blocked for a certain period of time. 6、Support unlock mode of 2 in 1 function, like password, Bluetooth app. 7、Uses smart password and micro lock core that is the most convenient password lock core. Just replace the old lock core, no need to replace the lock body and the lock door hole. 8、Made of high-quality zinc alloy material, it is safe, environmentally friendly, durable and sturdy in use. 9、4 AA batteries (not included) for power supply, which has the standby time of upping to 12 months. This system will have sound and light warning when the battery is about to run out. 10、USB charging port design for charging and unlocking in emergency situations. 11、The controller components on the indoor handle side are set to resist violent unlocking. 12、Applies to all opening directions. The length of the two sides of the lock bar can be adjusted to adapt to different door thicknesses. 13、Compact design, easy installation, exquisite and precise workmanship. Suitable for security doors, doors, wooden doors, glass doors. 14、Supports 100,000 rotative and reliable tests to ensure high stability and safety. 15、Low power design, it is energy saving, durable, strongly anti-interference. 16、Support for Android version, for IOS version, and Web version operating system. 1 x Ball Lock1 x Hex Screwdriver1 x Instruction Manual Condition: 100% Brand NewItem Type: LockMain Color: Silver Material: Zinc alloy Standard: Bluetooth 4.0 and abovePower Supply: 4 AA alkaline batteries (not included)Unlock Method: Password, Bluetooth appCustom Password: 150 groupsAPP Random Password: Unlimited number of groupsFalse Accept Rate: Less than 0.001%False Rejection Rate: Less than 1%Low Pressure Alarm: 4.8VPassword Length: 8 digits (randam)Cylinder Size: Approx.70mm/ 2.76in (30mm/ 1.18in, 40mm/ 1.57in)Applicable Door Thickness: Approx.38-100mm/ 1.5- 3.94inWorking Voltage: 4.8- 6.5vStatic Current: ≤ 30μADynamic Current: ≤200mATemperature Range: -20-70℃Operating System: Support for Android version, for IOS version, and Web versionApplication: Suitable for security doors, doors, wooden doors, and glass doorsChange of Open Direction: Applies to all opening directionsUnlock Mode: Password, Bluetooth app