I installed the I-Rock wireless remote this last weekend and so far am very happy with it. It is the floating keychain style and it works pretty good. My boat is not too easy to get in and out of from the front so the RF remote makes it simple to change the track or volume from anywhere within listening range.
can tie to board shorts and is waterproof
dont have to climb into the boat all the time
plastic holder can be zip tied to almost anything
It doesn't always respond on the first push of the button
you have to disable all your hard wired remotes if you have an Alpine