I had mine wired to a 12v " cigarette lighter " plug. Then I developed a squeal. Sal and I thought it was from the plug not providing a good enough ground so we hard wired it to the battery. That didnt help. My antennae is one of the magnetic ones. It seems the antenna is no good, dont know that it is because its a magnetic mount or if it was just junk to begin with. I was tring to make the whole thing easily removable also. I borrowed a set-up that was the same way ( 12v plug and magnetic mount antenna ) and it gave me no problems. I now have the radio permanently mounted just need to get a nice antenna.