Maintain 12v Batteries, Charge 5V USB devices, Connects to car via included OBD plug or alligator clips, Includes suction hangers x 4, Click here to download the Manual Connector:USB2.0 , Dimensions:171mm x 246mm , Opening Temp:-20 to 70c , Output:5.7W , Output Voltage:5VDC 14.4VDC , Weight:200g