Features: * Multiple Unlock Ways: BT unlock, APP remote unlock, card unlock, password unlock, key unlock. * Supported TT lock App: TT lock App is a smart lock app, with multiple functions including send temproary passcode/ekey remotely, manage passcode/ekey, view access logs, open the lock by APP remotely or nearly, passage mode setting, etc.. * Password support 30 groups 6-12 digitals. Support the anti-peeping virtual password enter, input the random passcode before or after the correct password, this makes your door much secured. * Adjustable Lock Cylinder: The inside handle can be adjustable freely, can be adjusted to the maximum length of 20mm. * Cylinder Size: 30/30mm, 35/35mm, 40/40mm, 60/40mm, 75/40mm optional (Standard: European Standard 40/40mm) * Copper lock cylinder, 304 stainless steel rear lock gall. Resisting sawing and destruction. Easy installation and safety guarantee. * Mechanical Key Unlock: Mechanical key external power supply interface as spare in case the batteries is dead. * Low battery alarm: When the battery power is lower than 3.6V, it will alert to remind you to replace the battery in time. * With the easy getting change of batteries, it saves up and be more convenient when power off. Battery with long life. * Smart card reader, Max. supports 200 IC cards.