I recently purchased the PT 270 AIU to have an outdoor stereo around our pool. I was interested to have many formats to play music from so this receiver was attractive. I generally play music from an ipod, MP3,or USB, but my wife was adamant that it have FM as she likes to listen to NPR or talk radio while reading her Kindle. After checking pawn shops for older low budget receivers, I thought this unit would have all of the options we wanted built in, for an awesome price, and it does.First off, many of the comments on here are spot on, and should be noted. Such as; mysteriously an on/off switch has been left off the remote, the input does revert to DVD each time you turn it on, as well as the volume is turned low (a benefit). The dancing lights although pleasant, give the impression it is an equalizer, which it isn't. Our fan is quiet, and I hope it stays that way, but I keep it in a suncast plastic outdoor cabinet, and you can't hear it. Manual is completely devoid of instructions, but who reads those anyway. The FM antenna is not worth using, and I suspect this is why many say the receiver does not work. Just take some extra speaker wire and hook it up and you will have a better one than supplied with the unit.Let me put some of the bad comments that I read in the review to rest. First everything on my unit works. Ipod, MP3, USB, FM, AM, Volume, Treble, Bass, Microphone, Remote, AM antenna, all switches, etc... I do not have a low level buzz or hum as many have claimed. I assume they have either a poor connection with their speakers, or some other electrical issue such as a poor ground. The ipod dock and built in retractable audio cord for an mp3 player work fine, make sure your players volume is turned up as that does effect volume levels!. However, the receiver does not automatically "find" your devices if plugged in, you must use the input switch and change it to the ipod/usb device. This is normal for a receiver (it's not a plug and play computer). The receiver is "defaulted" to be used as a home theater - with the DVD set as the "default" input at each start up. The station search does work on the receiver, as do the station pre-sets (and they do hold their memory), but you do have to figure out how to use them, as the manual gives no real instructions. The search function literally found all of the stations my car can, without static, radio works well and pulls a good signal. Volume with 4 Dual outdoor speakers is plenty loud for our deck. All in all, I am surprisingly happy with the purchase, and as long as it keeps running would highly recommend/purchase this product.