With 4-port USB can charge for IPAD and Samsung at the same time. With blue LED. USB port: 6(two for IPAD two for Samsung Galaxy series Tablet PC and cellphone and at the same time the 6 ports are suitable for IPHONE / IPOD and other USB digitcal products.). Input voltage is AC 100~240V. Output is DC 5V 2100mAh. Working temperature is < 60 degree Celsius. Overload protection: 11.55W. Working efficiency is > 70%.