Standard 1/4" InterfacerThe smart tracking holder comes with a standard 1/4" screw thread at the bottom that can be mounted on a tripod and adjust the angle and height. The included phone holder expands 2-4" wide to securely fit any size cell phone.
Built-in Rechargeable BatteryThe smart tracking phone holder is equipped with a built-in rechargeable 2200mAh battery and USB charging port. After fully charged, it will last up to 6-8 hrs. The red charging indicator is on when charging, after the charging is completed, the red charging indicator goes out.