Pyle?s Hydra series speakers are waterproof and designed for use in your boat, on the dock, by the pool, or simply mounted outside. They?re 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.