this is Nipron input power specification as below.
The selection switch is turned to 115V for use in Japan. The nominal voltage has 10% of tolerance. The lower limit is:
115×0.9 = 103.5V
Generally, many power supplies operate at approx. 90V, but some do not cover 100V of Japan's nominal voltage. Furthermore, the nominal voltage in Japan also has 10% of tolerance. The lower limit is:
100×0.9 = 90V
When power supplies with voltage selection switch are used in Japan, a slight voltage drop is likely to bring a big problem to them.
If you do not understand any spec. please do not buy anything into the Taiwan.
The answer is 90V to 125Voltage and 125V is Maximum