I'm unsure about the meaning of "The power supply is linear, designed for the primary voltage 220V, frequency 50Hz Perhaps under the order another voltage", mentioned twice - does that mean you had the option of requesting another voltage? Well, if it works out, great; if not, you're only out at the most $550. As with most Chinese goods, if it breaks you have to fix it yourself or throw it away.
Don't say anything important around it - it might be listening (and might be sharing information with Siri and Alexa).
Don't say anything important around it - it might be listening (and might be sharing information with Siri and Alexa).