Tested with 12v cigarette lighter at the other end my mobile phone supported on usb 1, and my electronic cigarette also supported on the usb usb 2. The two females are taken sufficiently spaced to plug both devices without problems . Small red bulb LED to indicate it is properly connected. For a ridiculous price in Indpc, I have no alternating téphonne portable electronic cigarette on my cigarette lighter. Also works well to recharge my GPS and my hands free kit car.