Plug the car modulator into the car's cigarette lighter socket. Connect a phone or USB stick to the modulator if you want to listen to music (via Bluetooth or USB). Select the FM frequency indicated by the modulator on the car's audio console — start playing your music/playlist. Use the USB charging ports for your phone — fast (20 W), if your phone supports fast charging. Mount the parking number holder on the dashboard — this way, your phone number will remain visible when you park, which is useful for parking lots. When you get out of the car, disconnect the modulator from the cigarette lighter and remove the USB stick to extend its life. Car Charger