【Double Base Mount】This product includes a magnetic head and 2 bases. One base has a 45mm adhesive mount and a 3M sticker on the bottom for attaching the headboard to any smooth surface such as glass or table. One base is 34mm magnetic base and a magnetic bottom allows you to use the head in magnetic areas such as rails. Double base for a variety of uses Detachable Magnetic Design: The surface of the free-head head is attached with the same magnet as the Action 2. The U-170 is an innovative magnetic release that allows the action 2 front touch screen modules and camera units. Also compatible with DJI Action3 [Free-head Head] [1/4 Screw Hole Adapter] The ball head rotates smoothly 360 degrees, making it ideal for shooting at any angle. Both the base and the head connection are 1/4 size screw, so if you do not use the base, the headhead itself is also suitable for tripod. Dji action2 not only for sports photography, but also for daily life ULANZI DJI Accessories Series; OA-11 Dual Interface Magnetic Mount; OA-12 1/4 Screw Hole Magnetic Adapter Mount; OA-13 Power Supply Magnetic Adapter Mount; MT-50 Magnetic Tripod * U-170 Double Base Head * U-180 Magnetic Free Head * C-action2 DJI Camera Cage Quality problems: We strive to make our product quality control, but if you have any problems with the product, please feel free to contact us. We will respond promptly within 24 hours