How many volts is the battery charger of Xinruixiang electronic scale tcgt27z 100?

Four volts. Xinruixiang Electronics Co., Ltd. was established on February 23, 2006 with a registered capital of 5 million yuan. Its registered address is the North Building of Jinwen Building, Binhe Road, Miyun District, Beijing, and its business scope includes electronic scales and electronic watches. Xinruixiang electronic scale tcgt27z 100 The voltage of the battery charger is 4 volts, and it can only be used normally if this voltage is maintained.