The article focuses on LONGWELL Household 25W 30W 35W 150W 180W Solar Roof Exhaust Fan, which is waterproof and suitable for outdoor use. The product description includes models like LW-SPF-320D/LW-SPF-320E and LW-SPF-320F/LW-SPF-320G. It also mentions the diameter of the cylinder, with options like 320mm and 600mm. This solar power exhaust fan is intended for household use and emphasizes its waterproof feature for outdoor environments.