inputs.text: works great slight hum - bulging head shape not fit cigarette lighter front seat ash tray right next way fit side window cigarette lighters fine plugged red light comes faint buzzing sound not work first notice not plug laptop way difficult plug adapter lighter plug adapter first plug adapter lighter everything works finethe adapter not merely designed dell laptops anything takes regular plugin work two prong three prong appliances use 150w electricityi happy product recommend anyone