Rosewill RHB-344 USB 3.0 4-Port Hub and Fast Charging with Voltage & Current Display Screen for Each Port Detection 4 Ports fast charging for multiple smart phone and tablet Voltage & Current Display for Each Port Detection Unique select button for changing LED indicators to detect output voltage and current of each USB powered devices Backwards compatible with USB 2.0 and USB 1.1 5V/3.5A Adapter Included