I purchased this unit as I was seeking a compact, portable and cost efficient solution for charging my Samsung Galaxy S3 LTE. The unit has a smooth shiny black gloss finish and sports some high quality power cells from what I have experienced. My phone has a standard 2100mAh battery, so the Astro2 charges it FOUR times over. The unit also has a bright LED light built in as well. It has 2 USB ports for varied rates of charging (Android & Apple) and can simultaneously charge 2 phones as well! Great value and innovation from Anker, which recently led me to buy the newer and slicker Astro2 2nd generation power unit as well!