*2A Input & 2.4A Output: 2A input can save half of the time to fully charge the 6700mAh portable charger ( please use a 2A or higher output charger); 2.4A output makes it charge other devices 2X faster than other chargers. The maximum input and output for the fastest and strongest charging experience.*Exclusive iSmart Technology: Charge faster and smarter than others, automatically detects and delivers the optimal charging current for any connected device- ensuring the fastest and most efficient charge.*Compact body, amazing capacity: Fitting in the palm of your hand, the 6700mAh upgraded capacity can charge iPhone 6, iPhone 6s for 2.5 times, and more than one charge for large phones like 6 Plus, Note 4, etc*Unique Design: Made with an ergonomic design that is carefully matched with a gorgeous metal shell that will transform you into a style icon, while 4 status LEDs keep you informed of remaining capacity.*Safety Protection: Ultra reliable A Lithium-Ion battery with over 500 battery charge cycles; short-circuit and over-current protection. This battery pack will automatic shutdown if a short circuit or overload output occurred while unit is charging.*Amazingly PowerfulMeet the upgraded version of the RAVPower Luster Portable Battery Charger. This 6700mAh external battery charger packs 2 full charges for most smartphones, and is powerful enough to charge tablets and other devices. It will keep your devices powered throughout the day so you stay connected to the busy world.*iSmart Fast ChargingRAVPower iSmart technology detects the maximum current needed to charge your device safely, and controls the USB port output accordingly. So you can simply connect and forget, because iSmart always charges at the fastest speed. Every device, every time.*Safe InsideWrapped inside a scratch-resistant alloy shell is the RAVPower industry leading A Grade battery cells with over 500 charge-recharge cycles. Every RAVPower charger comes with multiple safety protections to guard against short-circuiting, current surges, and circuitry risks.*What's In the Box:1 x RAVPower 6700mAh Portable Charger1 x Micro USB Cable1 x User Manual