1.Made of full aluminum alloy material, rust-proof and drop-, yet sturdy; 2.Built-in spring design, a gentle pull allows for quick disassembly; 3.compact and , easy to install without any pressure; 4.Strong magnetic for automatic alignment and locking, allowing for quick switching between horizontal and vertical ; 5.Provides shock absorption for batteries, ensuring safety and stability; Enhanced dual interface compatibility with an port and 1/4 screw hole on the battery cover Compatible with Magnetic Accessories. Compatible with B:for Pro 2 /AC Colour:Black Material:Aluminum Alloy Package Contents: 1 x Battery Cover 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.