2. 3" to Max. 3. 3", fits most standard car cup holder, no need extra tools. Featuring one-button release curved arm and extendable feet, letting you can enjoy safe and the best viewing angle . Don't need to affix anything to your dash or window, just simply put it in your car cup holder and fix. Press button on below of the car holder to slide open and then take out mobile phone. Press the arms on both side to clamp mobile phone again, simple of operation. One locking lever for installing and removing the car mount. This new car cup phone holder is made with an adjustable heavy base and strong neck, which stops any shaking. A flexible swivel ball for 360 rotation and a jointed arm for 270 easy movement further enhance your view of the phone.