Compatibility : Designed to charge Most Handheld devices and Smartphones, Most Powerfull : Charge any USB powered devices at top speed continously. .Multiple Protections : Over-current, Short-circuit and Over-temperature protect your device, Auto Cut : On Over Heat. Small and Lightweight : Slightly heavier than egg, simply slip it into bag when you are out and about. Smart Charge: Auto Detects the connected device and charges it at the fastest speed of the device.