Water Resistant Bluetooth Marine 4 Channel Class A/B Amplifier Media Stereo on Boats UTV ATV Golf Carts and Cars. Mounting Type: Surface Mount. Item Dimensions: 8 x 3.9 x 1.96 inches. Product Dimensions: 8 x 3.9 x 1.96 inches; 2.58 Pounds. Item Weight: 2.58 Pounds. Item Model Number: 8541737301. The VELEX Class-A/B Marine Bluetooth Amplifier is a compact and powerful audio amplifier designed for marine applications. It features a surface mount design for easy installation. With this amplifier, a head unit is not required, as it can directly connect to your audio sources via Bluetooth, USB, or AUX. The amplifier comes with a wired remote control that has a 3-color LED indicator, allowing you to control the audio playback and switch between different sources. The wired remote has a S-terminal connector, and it is designed to be waterproof, with a silicone gasket to protect the amplifier from water splashing. The amplifier has a rustproof aluminum heatsink with a white painted finish, ensuring durability and resistance to marine conditions. All screws and mounting kits included with the amplifier are made from stainless steel, further enhancing its corrosion resistance. It provides a maximum power output of 180W into 4 channels, making it suitable for powering a set of 4-ohm 45W speakers. The amplifier supports USB charging at 5V 1A and has a frequency response of 20Hz – 20KHz. It is equipped with a 15 Amp Maxi Fuse for protection. Overall, the VELEX Class-A/B Marine Bluetooth Amplifier offers a reliable and high-quality audio solution for marine environments, combining convenience, durability, and excellent performance.