First International Digital irock! 300W Car FM Modulator

These ones are junk. They don’t work. The 400FM model is much better, and includes a jack so you can get a power adapter and use it instead of batteries. Please read comment section below! Very important!

I don't have audiophile expectations of a device that broadcasts radio frequency of mp3s. In spite of the limitations of the technologies, it sounds satisfactory. But, the folks at irock! really blew it with the on/off button. Positioned on the top of the unit is a 'soft-touch' button and red led indicator light/window. The indicator is impossible to see in daylight. And worse, I have not stored the unit in my car's console even once without it jostling around in there and activating the on button. Consequently, everytime I use it I must replace the two AAA batteries. They last a long time in normal play, but the position and sensitivity of the button is unacceptable. My Creative Labs Nomad III has a great feature for saving batteries - you must hold the on button down for a full 5 seconds to turn it on or off. irock! should take note . . .

Great idea, but in practice your iPod will need to be placed in some bizarre position extremely close to your car radio to avoid leaving your music flooded with static. In my case, it turned out to be wedged between the sun visor and the roof. Finding that perfect position while driving adds an extra and some would say unneeded jolt of excitement to any journey.

Overall, the product delivers as advertised. I must say however, that the range is surprisingly limited, often not stretching more than 10 feet. Forget about using it in the car unless the antenna is very close to the device. As a quick means of adding your MP3 or CD player to an existing stereo this works just fine.

fantastic little device. Little outdated, but what a cool look.. Play mp3s on your boombox.. No problems!

I got one of these for a 12 hour road trip with a friend. First of all, there are only four frequencies to choose from, and they are all right together. If there is a good station transmitting on anything near that, you are out of luck. My friend ended up having to hold the stupid thing the whole time to get a good signal out of it. We spent a LOT more time trying to get it to be useable than we did enjoying our tunes.That's the short of it - don't waste your money on this one.There are FM transmitters that do work just fine. The one I got after the iRock disaster was the iTrip from Griffin Technology. You can transmit on any frequency on the band, and you can even get international frequencies from their website. If your car can pick up, say 80.5 (it has to be a foreign car) you can use that frequency on the iTrip. It's awesome! The iTrip isn't sensitive like the iRock, either. You can turn your songs on and throw your iPod in the seat next to you, and you don't have to worry about the sound getting staticky. Oh yeah, and you don't have to have a battery for it either. It steals a tiny bit of juice from the iPod.My old battery draining iRock has now had the (depleted in less than a day) battery removed and is one of my cat's favorite toys.

The iRock is only moderately useful. The iRock has to be held close to the radio to work well without static. It does work, but not as well as it could. It is a little expensive for what it is and does, it seems to me. Ergonomically, it looks great, though!

I had originally read the reviews for the iRock! and decided to give it a try, but to keep the receipt just in case. I had wanted to use it with a mp3 player in my car and at work. I tried it in my car and didn't get that great of reception. I have an antennae that is integrated with my rear window, so I think that didn't help things.Then I tried it with my radio in my office, and it works great. I only get three stations in at work because of the interference from walls, so the reception on the iRock is flawless (it doesn't have to compete with any other signals in the lower frequencies). I'm very pleased with how it works in the office, and with my home stereo it worked just as well.Only having four radio frequencies to choose from is a weak point, as is the button that can turn the unit on accidently if you drop it in a bag with other items. It would have been nice if the unit had a couple of choices from higher frequencies as well as the low, and if it would turn on when it received the signal from your music source instead of a button that is too easy to accidentally switch on.The battery usage is about what I expected, with my situation I get around 8 hours of use with two rechargeable AAA's. At the end of the work day I just take them home and recharge them for another go the next day. Overall, I think this product does what it promises, just not extremely well in some cases. I recommend it for use in an office or home where the radio doesn't get a lot of stations.