PNY 12-24 Volt 3.4 Amp Dual USB Port Car Charger - Black (P-P-DC-2UF-K01-EF) Dual Universal USB ports for charging two devices simultaneously Dual Universal USB ports for wide range of devices 5 Volt DC output at 3.4 Amp max (3,400mAh) Optimal charging at speeds up to 1 Amp and 2.4 Amp per port for smartphones and tablets respectively, with a max charging speed of 3.4 Amp overall. 12-24 Volt DC input from power source LED indicator light Compact and convenient design for use in vehicle 1 year warranty