The RAP-SB-224-2-UN7U consists of a snap link, 2.75" diameter twist lock suction cup base and universal spring loaded X-Grip® cradle for cell phones. The suction cup, twist lock base is designed to have a strong hold on glass and non-porous plastic surfaces, including adhesive disks. The spring loaded X-Grip® cradle expands and contracts, allowing for a perfect custom fit of your cell phone. Combine RAM single socket technology for adjustment and the holding power of a twist lock suction cup and you've got a mount ready for the road and whatever vehicle you want to drive today. The X-Grip® includes a device tether recommended for outdoor applications. The cradle is compatible with handheld devices that will fit the dimensions listed below. It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.