Some common factors for Heated Massager quality control:
Appearance
Quantity check
Measurement(weight & size)
Battery charging test
Battery discharge test
Battery voltage test
Product use test
Noise test
Surface coating alcohol rubbing test
Belt tensile test
Sewing needle distance measurement
Heating sheet temperature test
Key function test
Timing power off test
Inner check
Barcode scan
Drop test
3M tape test for Logo