Fangrui Product Details Main Usage: The Power Transformer Is Mainly Used For Input And Output Conversion Between Different Voltages And Is Suitable For Electrical Equipment With Power Less Than 50w. It Is Equipped With American Plug, Suitable For The United States, Taiwan, Canada, Japan, Thailand, The Philippines And Other Countries.convert Voltage: Dual-channel Power Transformer, Manual Switching, The Voltage Can Be Converted From 110v To 220v, Or From 220v To 110v, Charging Is Not Blocked, Easy To Play Around The World.reliable Material: Adopting High Quality And Safe Abs Flame Retardant Shell, Strong Conductivity, Low Resistance, Less Heat Generation, Designed To Prevent The Danger Of Electric Shock, Higher Safety Factor.travel Companion: The Power Converter Is Small In Size And Easy To Carry, The 2-in-1 Entrance Meets Your Different Travel Needs, No Need To Carry Extra Converters Or Plugs, Saving A Lot Of Space In Your Luggage.application: Suitable For Cell Phones, Cameras, Electric Toothbrushes, Shavers And Other Small Power Appliances. Cannot Be Used With High Power Appliances Such As Vacuum Cleaners And Refrigerators. Overloading Will Easily Lead To Abnormal Heating Of The Transformer And Cause Damage.