Review on 🌊 Suptig High Power Dimmable Waterproof LED Video Diving Light - Fill Night Light for Underwater Diving, Waterproof up to 147ft (45m) - Compatible with GoPro Hero 6/5/5S/4/4S/3+, SJCAM SJ4000/SJ5000, YI Action by Mariqn Carey

I bought this item in July 2019. I only use it in a non-salt water pool. I noticed that the stainless steel knob was starting to rust. I informed the seller about this and sent photos and the seller replied. They wanted me to use stainless steel Brillo bullets. We also asked about the materials of 304 stainless steel, the data shows: 1. Under normal circumstances, 304 stainless steel does not rust. However, if the environment is not used or cared for properly, or the environment where the stainless steel is placed is too harsh, the stainless steel may rust.2. 304 stainless steel is not prone to corrosion and rusting, but will rust when encountering a large amount of fluorine ions. Under normal conditions, the corrosion rate of products in closed environments is higher than in open environments.3. Stainless steel is a very thin, strong and stable high chromium oxide film (protective film) formed on the surface to prevent further oxygen atom penetration and oxidation, thereby gaining the ability to resist rust. Once the film is constantly destroyed for some reason, the oxygen atoms in the air or liquid will keep penetrating, or the iron atoms in the metal will keep falling out and form loose iron oxide, and the surface of the metal will keep rusting. And I answered. The simplest condition in which rust can occur on stainless steel is when a piece of plain carbon steel or low-alloy steel rubs against the surface of a corrosion-resistant piece of stainless steel. Iron of ordinary steel will wear away on the surface of stainless steel as a carbon steel film, and after a few days in a humid atmosphere, this carbon steel film will form an ugly rust. This is because the carbon steel film on stainless steel contains virtually no chromium, making the film the common "red rust". Once the thin film of iron that has "contaminated” the stainless steel surface oxidizes, corrosion ceases when the stainless steel surface is exposed to the elements and almost constantly left unwetted. A rusty surface looks bad, but the chromium in stainless steel beneath the rust film forms a suitable corrosion resistant oxide layer and no further corrosion will proceed once this mild steel film turns to rust. When reaming ordinary steel on stainless steel, the material that is transferred to the stainless steel is commonly referred to as "free iron". This type of "contamination" of stainless steel is also known by the misnomer "carbon contamination". This term is misleading, because it is not carbon that causes corrosion, but the unalloyed iron that steel is made of. Corrosion of "free iron” on stainless steel is always faster than corrosion of mild steel itself because the "contamination” of free iron on stainless steel is anodic, so it corrodes to protect stainless steel just like zinc corrodes to protect carbon steel protect when zinc is used for galvanizing. . I didn't ask for a refund. I just wanted to know if the game is bad or something. I've had many stainless steel items and the ones that were rusted were defective or damaged from overuse. Also, I was concerned that if the rust was under the button (you can't see under the button) it would eventually damage the button body seal and allow water to enter. Otherwise the light is very bright. I was planning to buy another one from this company but I'm not sure if it was a bad batch or if they are all the same. I'll try with someone else. Also, the return time is over. I'm sorry it took so long.