1. No drilling, indoor installation, concealed installation and mark outside. 2. Outdoor card swipe unlock, mobile APP unlock. One-touch indoor unlocking, manual button unlocking. 3. The door will automatically lock when closed. 4. Live voice broadcasts. 5. Normally open function (passage mode/toggle mode) and low voltage alarm function. APP version unlocking records monitoring: IC card and APP unlocking records are retained. After using the lock on any mobile APP, connecting to the network and synchronizing information, all unlocking records can be viewed on the administrator APP. Application: Door locks for non-metallic interior doors such as homes and offices. Door thickness not exceeding 60MM Color: Black Material: Plastic + Metal Package Contents: 1 x Smart Door Lock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error