1. 1360-degree stable rotation: The auto-tracking phone holder uses an artificial intelligence computing system to automatically recognize and track your face or body, and rotates stably 360 degrees. 2. Built-in camera: The auto-tracking phone holder has a built-in camera for intelligent tracking. You don't need to download any applications or connect via Bluetooth. 3. Standard 1/4-inch thread: There is a standard 1/4-inch thread at the bottom of the auto-tracking phone holder for tripod installation and angle and height adjustment. 4. Expandable width of 2 - 4 inches: The 360-degree face-tracking phone holder can be expanded to 2 - 4 inches wide to firmly fit any size of phone and meet your different usage needs. 5. Long battery life: The smart-tracking phone holder is equipped with a built-in 2400 mAh rechargeable battery to ensure a long battery life.