Add more control to your JL Audio MediaMaster MM100s-BE marine receiver with additional key fob-style transmitters. Like the main controller included in the JL Audio MMR-10W system, this add-on remote operates at an ultra-high frequency of 2.4 GHz, so you can control your music and your MediaMaster receiver from up to 150 feet away with the larged, raised buttons. You can add up to 10 of these auxiliary remotes to your system.