I bought exactly the same thing from the Chinese, basically all of these types are the same, because I smelled the job, I bought two. The one that arrived started flashing like KITT from Knight Rider and then died (also the battery cover was broken and wouldn't stay on) and the second one that I tried to use today, the blades got cut, basically the plastic around the blades turned into pieces from contact with the brake fluid... You understand the quality when you have bought a tool to use it maximum once a year and that one time it fails you.