Outfitted with ultra-efficient, Bluetooth Low Energy technology, the MMR-25W controller delivers convenient handheld command of your MediaMaster source unit (MM105 or MM105-HR), from up to 35 ft (11 m) away.Featuring a sealed, water-resistant (IP68 rated) design and large button layout, the MMR-25W remote controller incorporates an ergonomic, key-fob form that allows comfortable operation of frequently used functions, all while on the move. Onboard LEDs permit easy selection and adjustment of all or specific audio zones.Constructed with UV and salt-water rated materials, the MMR-25W controller is built to withstand the harshest outdoor elements. For added convenience, a silicone wrist lanyard and mounting cradle are included. The cradle's simplistic design permits installation on any flat surface. A replaceable 3 V (CR2032) battery is also included. Up to eight remotes1 can be directly paired to a single source unit (additional remotes sold separately).