IJO1919 Features: * Ground and power outlet * Provides a convenient electrical ground and power source from the vehicle * Plug the tool into the cigarette lighter or power accessory receptacle * Ground and power source on the dash * Plug light will come on to signal the plug is properly connected and both power and ground are available at the posts * For power, connect to the positive (+) terminal * For electrical ground, attach ground wire from the instrument to be grounded to the negative (-) terminal Dimensions: * Weight: 3 oz