The Pyle Hydra Marine Amplifier is an upgraded Elite Series 800 Watt 4 Channel amplifier designed for marine use. With features like waterproofing and a remote control, this amplifier is perfect for enhancing your boat's audio system. It has a compact size of 6.1 x 3.35 x 1.38 inches and weighs 4.38 kilograms, making it easy to mount on your boat. With a one-year limited warranty, you can trust in the quality of this Pyle amplifier to deliver powerful and clear sound while out on the water. Open box but has been tested.