Water Resistant Rocker Switch Bluetooth Controller & Receiver Upgrade your powersports audio system with the Diamond Audio BTR4 Water Resistant Rocker Switch Bluetooth® Controller & Receiver, engineered for reliable wireless performance in demanding environments. Designed for motorcycles, small watercraft, golf carts, UTVs, ATVs, and utility vehicles, this compact Bluetooth audio controller delivers seamless streaming without the need for a traditional head unit. The BTR4 Bluetooth receiver func
