The product change the usual USB charger into high-speed charger(the output power\/currenct of usual USB charger must be more than 15W\/2A).Please Watch the video for futher understanding Features: 1. IC control the charging process, high efficiency, 2. Avoiding overcharging, up to 95% charging saturation. 3. Exterior upscale, stylish and easy to carry with travel choice. 4. Undergo rigorous testing aging process 5. Security, stability and compatibility have reached the international standard safety and reliability. 6. For the following on the capacity 4200MAH lithium-ion cell phone battery (the cell phone should support high-speed charging function) Specifications: 1. Input: 5V2A 2. Output: 5V2000mA\/9V2000mA\/12V2000mA 3. With a indicator 4. Material: ABS plastic 5. Voltage 4.5V 6. Color: Black 7. Compatible with mobile phones, miner flashlight, digital products Package Included: 1x Charger adapter