This product is designed for the Japanese market with 100V AC 60 Hz.
If you seek 100% safety in the United States (120V AC 60 Hz), we recommend using a transformer.
Among our customers, there are those who use this product within the United States at 120V without a transformer. In fact, we have received several reports from users who say that they have used the FR301-82 at 120V without any problems. If you decide to use it at 120V, please do so at your own risk.
The plug for this product is a two-pole grounded plug type (Type A), which can be used with American two-pole grounded plug type (Type A). Please check the 7th image of the product for the shape of the plug.