1. The product cover is a aluminum alloy metal it was cut by CNC high progress digital controlled machine a integrated cover high strength structure impact resistance it also with a exquisite anodic oxidation surface treatment it is not just Sweatproof corrosion resistance colorful it also satisfy all kinds of users needs a ultrathin design easy to carry both cell phone and power bank with a single hand perfectly human and device project design. 2. The product is using Top A battery it can recycling use at least 800 times stable enough battery capacity Do not heat. 3. It controlled by a high intelligent chip automatically recognition connect and disconnect automatically power off low power dissipation stable input efficient conversion rate fast charging speed safety Zero damage to phone. 4. Seven protections design for the circuit: over charged protection over output protection over voltage protection over electric current protection over power protection temperature protection short-circuit protection. 5. All product connectors are at the same side including Micro input connector USB output connector. Simple look easy to handle convenient. 6. It comes with the same color for Micro USB noble cable you can charge your phone and transmit data the cable is a magnetism joint convenient to carry and storage.