Featuresr compatible with most of usb devices such as iphone ipad ipod samsung blackberry and other smart phones mp3 etcr 4 usb ports one exclusively for ipad iphone one for galaxy and two standard usb portsr supports charge 4 devices at one time through just one wall socketr with a compact design offers fast and efficient chargingr short circuit protection so it39s safe enough to user led indicator blue lightempty load or complete charging bluered lightwhile charging