The movement of this batch of vacuum cleaners should be brand new and unused, not a disassembled movement. This manufacturer makes high-end vacuum cleaners. Some motors are welded plates, and some are already welded. The circuit board at the back It is only used for anti-interference, and it has little effect. The quality of these vacuum cleaner movements is not bad, and they all come with a rubber cover, which is more convenient for DIY use. Since the whole movement is in bulk, the rubber cover of some movements may be slightly incomplete. Beautiful, but if you remove the rubber cover, it's pretty bright inside. Weight: 272 grams The measured parameters are as follows: Voltage: 9V Current: 4.7A Speed: 13000 rpm Voltage: 11.1V Current: 6.2A Speed: 15500 rpm (rated power pressure) Voltage: 12V Current: 72A Speed: 16600 rpm Note: The power supply current of the power supply is preferably more than 15A.