I put it in the KIA RIO 3's head unit. I supplied electricity to the radio (an iPod) using its USB connector. Without hiccups or delays, it functions well. Automatic connection takes about 2 to 5 seconds. Of course, the sound quality is slightly worse on 3+. Hearing does not cut, however listening to AUX makes a big difference. This is probably because this adapter only supports the most basic Bluetooth audio codec, or SBC, which is a big disadvantage compared to competitors.