Compatible with Xiaomi Mi Max Smart to lock and unlock your Mi max. Unibody and the wrapped around design, this protective flip case protect your xiaomi Mi Max from all around. With the window design, you can answer calls without open the flip cover. it is comfortable. How to make it smart on your Mi max? 1. Select "setting" on the menu 2. Select " lock screen,password,fingerprint" on setting. 3. select" smartcover mode" on lock screen,password. 4. select"Transparent front cover".