I was using it for audio equipment. It works without any problems. This is a high-quality, Japanese-made voltage conversion transformer. It's a 500W model that supports voltage conversion between Japan and overseas, and its solid construction makes it suitable for both professional and hobbyist use. Ideal for: - Overseas audio equipment - Imported appliances - Japanese use of products designed for American voltage (120V) Manufacturer: Nissho Industry Co., Ltd. • Model Number: MF-500-U • Rated Capacity: 500W • Input/Output: • When used in Japan: AC100V → AC120V • When used overseas: AC120V → AC100V • Frequency: 50/60Hz compatible • Made in Japan (MADE IN JAPAN) This model allows you to switch the input voltage using the main switch.