It is not easy, a 2 Amp input connector for charging, operation performed in 4 hours with a quick wall charger, one double with my smartphone and an output connector iSmart 2 Amp Max to recharge all types smartphone, tablet, iPod and other Bluetooth accessories in record time with an always ideal current that will protect the life of my battery. What I appreciate most is that despite considerable autonomy, it takes no more space than a pack of cigarettes. It therefore fits perfectly in a pocket or a handbag. A manual in French and mini USB cable provided. Finishing, packaging and delivery via Amazon impeccables.Très good value for money.