This water heater is specially designed for Volvo trucks, model 15776. The product features a metallic cylindrical body, silver in color, with a series of attached components and cables. The number “15776” is inscribed on the body surface. The back is covered with a black material, which appears to be a protective casing for the internal components. There is a yellow sticker with warnings and usage instructions. This heater is essential for maintaining water at an optimal temperature in the cooling systems of Volvo trucks.