The Pyle 4’’ Waterproof Rated Off-Road Speakers with Amplified Bluetooth Remote Control Receiver – Compact Dual Vehicle Speaker System for ATV, UTV, 4×4, Jeep, PowerSports Vehicles – Waterproof Rated Speakers + Bluetooth Controller System Kit – Universal Mount System for Convenient Audio Control – Bluetooth Wireless Music Streaming Ability – Waterproof-Rated Marine Grade Construction – Weatherproof & Water-Resistant Design – Compact & High-Powered System Output – Used for Car, Truck, ATV, UTV, 4×4, Boat, Marine Watercraft, PowerSport Vehicles – What’s in the Box: – (2) 4’’ -inch Marine Speakers – Amplified Bluetooth Control Unit – Installation / Mounting Kit – Speaker Connection Wire- Bluetooth Control Unit: – Built-in Bluetooth Audio Receiver – 2-Channel Amplifier Style – Works with All of Today’s Latest Devices – Smartphones, Tablets, Laptops, Computers, etc.