The Pyle Elite Series Amps provide waterproof power for all of your speaker needs. The marine grade waterproof construction and high-power efficiency ratings provide performance and reliability -- rain or shine! These multi-channel amplifiers are perfect for the back yard, boat or even by the pool! Additional features include MOSFET power supplies, built-in electronic circuitry protection, heavy-duty aluminum heat sinks and more. Enjoy versatile waterproof performance and next level sound amplification with the Pyle Elite Series Amps. (Models: PLMRA200, PLMRA400, PLMRA420, PLMRA620, PLMRA820).