What is a2d2? I use to have a Jabra Bluetooth receiver from best buy. It clipped to the visor and had a 12v USB cig plug with a built in speaker which was pretty loud and very clear. And it also played through the radio when both are set to the same frequency. I didn't use the cig plug. I used an old USB cig lighter plug and hard wired it to the overhead console and had the USB end sticking out about 6 inches to reach the Jabra unit. Then I bought my touch screen with built in BT lol but I still have the Jabra at home.