Review on 🔊 4 Inches Heavy Duty Waterproof Boat Marine Box Bluetooth Outdoor Speakers: Perfect for Camper, Skid Steer, ATV, UTV, RZR, Golf Cart, or Tractor! by Craig Walters

Good: Easy installation, wiring and Bluetooth setup. My phone connected to the system within seconds. I have a 1970 Rumelwagen and it has a lot of volume. Good quality speakers. When you turn it on, you will hear a thin beep indicating that the device is paired with your phone. Dislikes: Bad hardware. I had to use my own nuts, bolts and washers. The bracket is cheap aluminum and flexes easily, so be sure to use a shim. The 12v power wire for the bluetooth device detaches easily, so I had to hot tape the wire to keep it in place.