COMPLETELY WATERPROOF- Marine grade construction build Marine grade construction build IP44 waterproof certified rating for consistent sound quality regardless of weather conditions so you can enjoy high-fidelity quality sound on your boat just as you do at home | RELIABLE QUALITY - Pair of 3'' ABS Material with Superior Standard . Includes all necessary installation cables & wires to enjoy a more consistent & enhanced sound field with full range stereo surround sound reproduction. | Compatible With Bluetooth-The whether resistant loud speaker system is equipped with wireless music streaming. so you can listen to streaming music services through your system,It can reach 20 meters, wherever you are in the Motorcycle ,hot tub ,boat,spa room. you also can enjoy a high definition stereo sound | EASY INSTALLATION-The Flush mount speakers is compact in design and size, pretty much easy for installation for any places. the outside facial Diameter of our waterproof speakers is 3.94” with Mounting Hole Diameter: 2.83”, and Mounting Depth:2.95” | IDEA FOR -Boat ,Motorcycles,hot tub, Golf Cart,ATV, UTV,RZR ,RV,Speedboat, pontoon,off -road And Other 12 Volt Applications