Saving Charge Time - Accept 12-24V input. Boast 2.4A current capacity total, get safe, fast charge but never hurt the battery of iPhones, Samsung Galaxy, and other android mobile devices. A great travel usb charger to power your devices. Smart Charging Technology - The inbuilt intelligent IC chip automatically identify and offer the best current for your devices. Provide max up to 2.4A when a single port works. Improve charging efficiency by 30%. (Does not support Qualcomm Quick Charge). Dual-port Design - Charge 2 devices simultaneously at full speed. When both 2 ports work, the embedded IC chip will automatically limit an output max up to 12W/2.4A, effectively avoiding overheat and overload. Multiple Protection - Carefully crafted using premium materials to ensure you and your devices safe from over-voltage, over-temperature, over-current, static and surge protection. Warranty Policy - All year 365 days 24 hours online customer service support and 18 months of hassle-free warranty policy.