With this smart door lock, you are free to use fingerprint, password, IC card, manual keys to unlock. You can also use the phone APP to remotely control it wherever you are. This makeover product ensures maximum flexibility and for your life.About this item: TTLock App Compatible: TTLock App is a app, with multiple functions, including send password/temporary remotely, manage password/, view access logs, open lock by APP remotely or , mode setting passing, etc.Mechanical key unlock: Spare mechanical key and external power supply interface in case the batteries run out.Multiple ways to unlock: BT unlock, TTLock APP remote unlock, fingerprint unlock, password unlock, IC card unlock, key unlock.Low battery alarm: When the battery power is less than 4.8V, the alarm is activated each time with unlocking to remind you to replace the battery in time, and the lock can be unlocked 200 after the first alarm.Easy Battery Change: With easy battery change, it saves money and is more convenient when turned off. Long lasting battery.Specifications:Connectivity Bluetooth 4.0, WiFi (G2 Bridge is required)Voice Control via Alexa: Yes is required.Unlock Mode: Password & # 43; IC card & # 43; TTLock (BT) & # 43; Digital printing & # 43; Manual KeysPassword Capacity: 150IC Card Capacity: 200Fingerprint Capacity: 120Fingerprint Reading: Semiconductor SensorButton Type: Capacitive Touch ButtonReading Time: 0.5S WorkingPower: 4 x AA Battery (Not Included)Operating Temperature: -30 to 70CSuit for the door thickness of about 35-65mmInformation PackageColor: SilverMaterial: metal+plasticPackage Contents:1 x Door LockOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.