Pyles Hydra series speakers are waterproof and designed for use in your boat on the dock by the pool or simply mounted outside. Theyre designed with rust-proof mesh covers for quality protection. The PLMR41B is a pair of black 4 dual-cone full-range speakers suitable for marine or car door use. The polypropylene cone accurately reproduces sound and the molded ABS plastic basket keeps your sound distortion-free. Package includes mounting hardware and wires. DETAILS4 Dual Cone Full range Speakers Completely Water Proof For Marine or Car Door Use Polypropelyne Cone with Cloth Surround Built-In Molded Grill Molded ABS Plastic Basket 15 Oz. Circuit magnet Frequency Response: 100 Hz-18 Khz Impedance: 4 Ohms Input Voltage: 6.32V Mounting Depth: Only 3 Black Color Marine Speaker Complete Pair with wire & Mounting Hardware Cut-out Size: 97 mmSpecificationPyles Hydra series speakers are waterproof and designed for use in your boat on the dock by the pool or simply mounted outside. Theyre designed with rust-proof mesh covers for quality protection. The PLMR41B is a pair of black 4 dual-cone full-range speakers suitable for marine or car door use. The polypropylene cone accurately reproduces sound and the molded ABS plastic basket keeps your sound distortion-free. Package includes mounting hardware and wires.