This 2-port charger is a power adapter that has 2 USB (1x 1 Amp and 1x 2.1 Amps) ports. This will charge or power most devices. Simply plug this adapter into your vehicle’s cigarette lighter outlet, then up to 2 USB cables can go into the adapter. Up to 2 devices can then be charging or used. The 2.1 Amps port is ideal for tablets or fast-charging compatible devices. The 1 Amps port is not as fast.