Features: Maximum capacity of 12000mAh. Dual USB output: 5V/1A and 5V/2.1A, able to charge two devices simultaneously. Equipped with USB cable and 30Pin adapter to charge a wide range of electronics: Tablet PC, iPhone, Samsung, HTC, etc. Long service life: Circle time is more than 1000. Power level indicator: Four blue LED lights on for full and one for low. Excellent workmanship of shell, durable and shining. Intelligent protection against overcharge / overcurrent / overvoltage / shortcircuit. New fashionable appearance, simple and portable.