Both the H1 and H5 Premium holders are made of aluminum for lightweight strength and premium elegance as Luxa2 is known for. The Luxa2 H1 is designed for desktop use while the H5 can be affixed to a car windshield. The new Premium versions of the Luxa2 H1 and H5 also feature various color ptions including silver, black and red. Smartphones with display sizes of 3.2 inches to 4.8 inches are supported with a maximum device dimension compatibility of 5.9 x 3.15 x 0.4 inches (L x W x D). Both the Luxa H1 and H5 Premium holders utilize a high friction silicon backing and six adjustable rubberized arms for holding the mobile device in place while users rotate or tilt it 360 degrees (300 degree tilt for the H1 Premium). The Luxa H1 Premium mobile holder and H5 Premium car mount both carry a $39.99 MSRP from Thermaltake`s online store or through other major retailers worldwide such as Amazon.com./"