As a result of my tests, I determined that this product provided excellent thermal relief, keeping my equipment at a safe and optimal temperature. The ease of installation was also a plus. However, the noise level was noticeable in a quiet workspace.
I bought this 50x50mm thermoelectric cooler and got a 40x40mm product. I sent it back and bought another 50x50mm piece. Again received the goods in the size 40x40 mm. I'm returning too. I'm taking my business elsewhere.