Is the perfect solution for conveniently mounting your Smartphone devices to your vehicle’s cup holder. The adjustable cup holder base adapter lets you use any choice of your favorite suction cup phone-based mounts. Whether you prefer a magnetic mount, a universal grip, or a wireless charging mount, this adapter turns it into a cup phone holder mount. It fits into just about any vehicle cup holder. Rotate the bottom portion of the cup holder base to reduce the base in size and place the bottom of the base inside your vehicle’s center console's cup holder, then rotate the top portion to expand and secure it in place. Easily transfer from vehicle to vehicle.