Want to use your Harman Kardon Onyx Studio speaker in the car? This UpBright car DC adapter lets you power it from your vehicle's 12V outlet (cigarette lighter). Works with Onyx Studio models 1, 2, 3, 4, and 5 - basically the whole series. Brand new from UpBright, a known maker of replacement power supplies. Perfect for road trips, tailgating, or any time you want to bring your good Bluetooth speaker along but don't want to rely on battery. Just plug into your car's outlet, connect to your speaker, and you've got continuous power. Much better than watching your speaker die mid-jam! Note: This is just the car adapter, not a wall charger. Keep your music going wherever you drive.