With this clever door lock, you're loose to use fingerprint, password, IC card, handbook keys to unlock. You can also use the phone APP to remotely management it wherever you are. This makeover product ensures most flexibility and to your life. About this item: TTLock App Compatible: TTLock App is a app, with multiple functions, including ship password/temporary remotely, manage password/, view access logs, open lock by APP remotely or , mode surroundings passing, etc. Mechanical key unlock: Spare mechanical key and exterior power supply interface in case the batteries run out.Multiple methods to unlock: BT unlock, TTLock APP distant 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 at any time when with unlocking to remind you to switch the battery in time, and the lock can be unlocked 2 hundred after the first alarm. Easy Battery Change: With easy battery change, it saves money and is extra convenient when grew to become off. Long lasting battery. Specifications: Connectivity Bluetooth 4.0, WiFi (G2 Bridge is required) Voice Control by way of Alexa: Yes is required. Unlock Mode: Password & # 43; IC card & # 43; TTLock (BT) & # 43; Digital printing & # 43; Manual Keys Password Capacity: a hundred and fifty IC Card Capacity: 2 hundred Fingerprint Capacity: a hundred and twenty Fingerprint Reading: Semiconductor Sensor Button Type: Capacitive Touch Button Reading Time: ≤0.5S Working Power: 4 x AA Battery (Not Included) Operating Temperature: -30 to 70°C Suit for the door thickness of about 35-65mm Information Package Color: Black Material: metal+plastic Package Contents: 1 x Door Lock Only the above package content, other products are not included.