AT&T Dual ports 2.4 Amp USB Car Charger can charge up to two of your devices at once while you are on the go. Built-in safeguards protect your devices from excessive current, overheating and overcharging. Blue LED indicator light lets you know the status of the charge. Small and compact design. Charge all USB powered devices from iPhones to Android phones, tablets, GPS units, Bluetooth headphones & speakers, smartwatches & more.