Item description from the seller

This step up & down transformer can step-up voltage from 110-120Volts to 220-240Volts or step down voltage from 220-240Volts to 110-120Volts, easily connecting to multiple electrical appliances at the same time. Equipped with 4 AlternatingCurrent outlets, toroidal core technology, and multiple protections, this voltage transformer ensures stable output and high conversion efficiency.
Features:
Universal socket, electrical appliances from different countries can be used.
The transformer features a portable handle for easy transport, allowing you to conveniently carry it when traveling to other countries.
One-button to turn on, simple operations.
The casing design has multiple heat dissipation holes, making the heat dissipation effect more significant.
Made of fine quality material, stable in use.
Quick response, low noise, stable transmission and AntiInterference.
The voltage converter is compatible with most plugs, providing fine convenience for you with different electrical appliances, such as water dispensers, fax machines, etc.