Why does the product specification sheet state an Input Voltage of 88-264Vac, while the machine specification sticker indicates 100-240V?

Why does the product specification sheet state an Input Voltage of 88-264Vac, while the machine specification sticker indicates 100-240V?

Users see the input voltage range marked on the machine. In fact, during safety certification, a so-called tightened ±10% test is conducted (IEC 62368-1 tightened +10% -10% For AC input products). Therefore, the voltage range defined in the power supply specification will not cause any problems in use. The marking on the machine meets safety regulations and ensures that users can input the correct power.