The SM621 lighter socket car mount holds large smartphones up to 6.75" tall, including the Samsung Galaxy S4, Galaxy Mega, and Galaxy Note 3. It also holds mid-sized (7" or 8") tablets, including the Apple iPad mini, Kindle Fire HD, and Google Nexus 7. It includes Arkon’s Slim-Grip Ultra spring-loaded universal holder and lighter socket mount with integrated power dongle. Connect your phone’s car charger (sold separately) to the 12V power dongle on the mount while your phone is mounted to the car’s accessory outlet or cigarette lighter socket. The smartphone or tablet is held securely in place with the spring-loaded holder, but can be inserted or removed from the mount with one hand. Included with the holder are 8 support legs (4 short and 4 longer versions). The top and bottom adjustable-leg design of the Slim-Grip Ultra helps keep any side buttons and ports unobstructed. The recommended configuration for most smartphones and mid-sized tablets is to have 2 short legs on the top of the holder and 2 of the longer legs on the bottom of the holder. For phones with height larger than 5.25", use the 4 long support legs for best performance. Fits all non-flip smartphones, even those with ruggedized or large protective cases or skins. Loosen the wing nuts to adjust the mount up to a 90° angle, and the swivel ball adapter head provides 360° rotation for ultimate flexibility. Garmin GPS devices can also be mounted to the car’s charging outlet or cigarette lighter socket by simply unscrewing the swivel ball adapter head and revealing the 17mm ball mount base.