Specifications: In car holder and charger for most smart phones Over current and over voltage protection Power supply DC 12v Output current DC 5V, 1A, 1.5A, 2.1A (please see each model current specs) Features: 3.5 - 4.3" phones, GPS, PDA, MP4 & other devices Compatible with all cars with working lighter 360 degree adjustable rotation adjustable holding width from 45 - 75mm & height from 108 - 135mm gooseneck design