Featuresr maximum capacity of 12000mahr dual usb output 5v1a and 5v21a able to charge two devices simultaneouslyr equipped with usb cable and 30pin adapter to charge a wide range of electronics tablet pc iphone samsung htc etcr long service life circle time is more than 1000r power level indicator four blue led lights on for full and one for lowr excellent workmanship of shell durable and shining r intelligent protection against overcharge overcurrent overvoltage shortc