Specification: Input voltage: DC12-24V, suitable for global automotive use Output parameters: DC5V / 500mah DC5V / 1 A DC5V / 2 A Stability accuracy: 5% Suitable: All car and cables, such as For iPhone,For Samsung,For LG,For Sony ,For HUAWEI,For HTC etcFeatures:-Extra Safety Protection Features: 1,Simple, small and elegant design. Environmental ABS material, super-compact form factor. 2,Size: 3.9in x 0.8in x 0.9in 3,Smart-chip with short circuit protection never heats or overcharges battery. 4,3.1A Dual Port (2.1A, 1.0A) USB Car Charger charges your iPad, iPhone, iPod, HTC, Blackberry, MP3 Players, Digital Cameras, PDAs, Mobile Phones 5,Rapid 2.1A Charge Colors:Grey, Red,Green