1. Compare prices and channels. The price is obviously lower than the market price or purchased through unofficial channels, and there is a risk of fake and inferior products. It is recommended to choose an officially authorized channel or dealer when purchasing.

2. Check marks and trademarks: Sony trademarks and related certification marks, such as CE marks, should be clearly visible on Sony flash. You can carefully check whether the logo and trademark on the product are complete and clear, and compare them with official website or other genuine products.