No Drilling, indoor installation,concealed installation and no marks outdoors Outdoor card swiping unlocking, mobile app unlocking. Indoor one click unlocking, manual knob unlocking The door automatically locks when closed APP version unlock record monitoring: IC card and APP unlock records are kept. After operating the lock on any mobile app, connecting to the network, and synchronizing information, all unlock records can be seen on the administrator app Name:Indoor invisible intelligent Wood door lock Suitable for:only Wooden doors Style:Magnetic lock Unlocking method: outdoor IC card unlocking, indoor button unlocking, TTLOCK APP unlocking Closing the lock: The closing principle of a magnetic lock relies on magnetic attraction. Only when the lock tongue and lock buckle are facing each other will the lock tongue be attracted by the magnetic force, thus closing the lock IC card sensing distance: 50mm Lock buckle: The height of the lock buckle can be adjusted by 21-25mm Applicable to door thickness:Less than 60mm Color:As Shown Material:ABS Package Contents: 1 * Punch-Free Smart Invisible Lock