1. There must be 3C certification, and you must look for 3C certification when purchasing
2. Look at the power, single person does not exceed 60w, double person does not exceed 120w
3. The wires inside the electric blanket are arranged regularly without cross-knotting.
4. The power controller has a clear switch mark, and the power cord should be double-sheathed
5. Note that there should be no rustling noise when power is applied