Cradle - X-Grip® - High-strength composite and rustproof marine-grade stainless steel construction - Spring-loaded holder expands and contracts for perfect fit on your device - Rubber-coated tips will hold device firm and stable - Includes 1" ball; mount adapter is not required - Compatible with handheld devices that will fit holder dimensions: minimum width of 1.875", maximum width of 3.25" and a depth of 0.875" - It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size - Compatible devices: Apple iPhone® 5 with or without case/sleeve, Apple iPhone® 4S with or without case/sleeve, Apple iPhone® 4 with or without case/sleeve, Apple iPhone® 3GS with or without case/sleeve, Apple iPhone® 3G with or without case/sleeve, Apple iPhone® with or without case/sleeve, Apple iPod® touch (all models) with or without case/sleeve, Apple iPod® (G1-G5), and Samsung GALAXY S4 with or without case/sleeve