This Tilta Arca-Type Phone Mounting Bracket for DJI RS 3 Mini attaches to your Smartphone via a universal clamp and utilizes an ARCA Quick Release Plate on the bottom which allows you to conveniently mount the system to ARCA based gimbals like the DJI RS3 Mini.
The Cold Shoe Receiver on the top of this Mount Bracket allows you to mount small Cold Shoe based accessories like external microphones.