Wifi & internet remote control. Change password remotely via internet When the user opens the door, the administrator receive a real-time prompt message This smart app can be used as time attendance Remotely view the status of the door, open or closed 128-bit encryption to prevent all hacker hidden dangers Note:Distance between gateway and lock should be better within 10m. Note:To make sure you are to use and home tocontrol Lock, please search TTLock in and ScienerSmart in . If it's found in or home, then there is no problem to use. No lock included in the package. Color:White Material:ABS Package Contents: 1 * Smart Gateway 1 * Data Cable Only 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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!