Car and Driver Air Vent Mount Holder Universally Compatible with Smartphones Allows for single-handed use, enabling safer driving conditions while reading and following directions Attaches directly to an air vent in vehicles for easy, hands-free clamping of your device Fits most devices sizes, cushioned tightly-fitting clamps can expand to accommodate device widths up to 4.5" Clamps are equipped with soft but firm cushions to ensure smartphones and other devices are safely secure Use on the go to hold your smartphone, MP3 player or navigational system