Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useless in my Subaru Forester

I bought this for a trip between Northern Virginia and Arkansas. Lots of rural driving where you wouldn't expect much interference from radio stations. We were unable to get a strong enough signal to listen to any music from my iPod. Sometimes an acoustical guitar would sound okay, but if they started singing, it was all over. It sounded like when you are driving over a hill going away from a distant radio station and you love the song and don't want to change the station even though it sounds horrible. You only really hear the song at all because you know in your mind how it goes.Per the instructions on the device, I switched it to Mono mode (that's supposed to boost signal), but that did not improve it. My Subaru Forester radio doesn't go down below 88.1, so I was unable to try using the lowest setting on the iTrip. This device may work well in some cars, but not in ours! I plan to see if I can return it. The only thing it did effectively was charge my iPod.