It is of intelligent security protection,you can realize a fast and safe charging. Plug and play, the charging speed is very fast, very convenient for using. With electricity indication light function, it will bring more convenience for you to know clearly of charging status. With dual USB output, this power bank can be used to supply power to many kinds of smart phones, mobile phones, cell phones. Automatic identification of your charging equipment, adjusts the output current. Compatible with all smart phones and tablet computers, supports charging and releasing functions It features intelligent charging circuit connection so that it connects devices to recharge automatically to realize efficient charging.