Features: Charging adapter seat, not need to disassemble, support charging and use. .Bottom magnetic two card + 1/4 positioning, transfer convenient and more anti-reversal. Aluminum limit bilateral snap, quick disassembly, connection is more tight. Bottom magnetic foldable two cards and with 1/4 screw hole adapter two-in-one, rich expansion of the adapter. real machine modeled concave design fit the body, combined with tight anti-rotation; aluminum technology: anodic oxidation treatments Specifications: Size: about 28x22.5x36MM/1.1x0.886x1.42in Color: Black Material: Aluminum Packaging method: bag Net weight of product: 34g Package Includes: 1Set Magnetic Two-Card Charging Quick Installation Seat note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution