This is the third time I've purchased a product of the same type.
The first one is a 40W (52cm) remote control product that uses coin batteries, and the vibration was okay. I bought it a second time because it's cost-effective.
The second one is also a 40W model, a remote control that uses two AAA batteries, and it uses the same protocol as the product I purchased earlier, so they can be controlled together.
The problem was that the vibration was so severe that I received a refund without having to return the product.
The third product I purchased this time is a 30W product, and the internal electronic circuitry is no different from the 40W product; only the LED size, number, and fan blade length are different.
The problem with this product is that the aluminum plate attached to the LED heats up, causing significant deformation of the plastic that holds the LED in place during long-term use. This is the result after 3 weeks of use. I installed it on my child's desk and it would have been turned on at its brightest for 6 to 10 hours every day for 3 weeks. There will be no exceptions; change will come. After purchasing the product, reinforcement is necessary for safety. I added a nickel plate and inserted a thin wooden plate onto the plastic surface.