78mm powerful loudspeaker delivers deeply bass with its large 3inch aluminum diaphragm and 20W powerful output, perfect for dynamic music and movie sound effects that require strong low frequency . black aluminum diaphragm ensures excellent sound clear with fast response and smooth high frequency extension, ideal for HiFi enthusiasts who appreciate detailed instrumentals and clear vocals. Durability aluminum drum paper and aluminum cap structure enhances rigidity to minimize distortion, maintaining stable sound even during prolonged powerful usage for consistent auditory . Fully waterproof design allows reliabled operating in humid environments like bathrooms, outdoor spaces, and car auditory systems, ensuring uninterrupted sound in various conditions. Package includes: 1PC 78mm black aluminum film 8ohm 20W loudspeaker