There are so many similar products in various price ranges, so I bought it after reading reviews of products with similar battery capacity, etc. First of all, the product makes noise at the level of a hair dryer when turned on at the lowest setting, but the sound is a bit sharp. Stage 3 is just noisy. . When I use my Apple Watch, a noise warning message appears. I thought the nozzle on the front could be used back and forth with a magnet, but this product can only be used on one side. Nozzle magnetism is good. In stage 3, it is not at the level of a pneumatic pump, but it has some power. When you shake it, the battery rattles a little inside. The finish is not very clean. This is a cost-effective product for simple car cleaning ----------------------------------------- -

The price is cheap, but the finish is crude and the performance is unstable at maximum intensity.