Features: 1. Quick-Install Magnetic Charging Base Strong Magnetic Base, Carrying Charging Function, Bottom PVC Gasket, Magnetic Dual- Interface 2. Auxiliary Charging Function, Connected To The Power Supply Through The Type-C Interface, Can Charge The Battery Life for The Action2 Camera Host 3. Magnetic Folding With Two Leaves Card Slot, Which Can Be Connected With Universal Three-Card Holder Accessories 4. It Can Be Connected With Bicycle Clips, Helmet Mounts And Other Accessories With Three Cards 5. Strong Magnetic Base Base, With Two High-Grade N52 Magnets, Strong Magnetic Force Description: Product Name: Aluminum Alloy Charging Base Process: The Surface Is Anodized Set: Set D-1 x Charging Base+1 x Helmet Holder+1 x Thumb Screw Set size: 4.2 x 2.1 x 1.75cm Material: aluminum alloy colour: black Package Contents: 1 x Camera Charging Base 1 x Helmet Holder 1 x Thumb Screw Set 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.