The JL Audio MMR-25W is a compact, water-resistant (IP68-rated) wireless remote that provides convenient handheld control of your MediaMaster MM105 or MM105-HR source unit from up to 35 feet away. Using Bluetooth Low Energy technology, it offers long battery life and reliable connectivity, with an ergonomic key-fob design and large, easy-to-use buttons for controlling zones and playback. Built for marine use, it includes a wrist lanyard, mounting cradle, and a replaceable battery for flexible operation on or off the water.*Includes total capacity of ALL paired Bluetooth devices (remote controllers, app controllers, streaming sources, etc.). MediaMaster MMR-25W remote control functions (source dependent) include: Power On/OffSource SelectionAudio Zone Selection/LockVolume Up/DownTrack Up/Down Track Fast-Forward/Fast-Rewind Favorite Up/DownTuner Seek Up/DownPlay/Pause Mute/Unmute Large buttons & LED indicators for easy zone control Includes wrist lanyard, mounting cradle, & CR2032 battery Supports pairing of up to 8 Bluetooth devices per source unit | JL Audio MMR-25W Wireless Remote Controller w/ Bluetooth Technology f/ MediaMaster