Technically not, actually. By the IEC standard, 50V (RMS AC) is about the highest you can go for 'Extra-low voltage'. IEC actually has DC up to 120 V as ELV but often regional standards will have a lower value (like EU seems to be 75V and Australia/New Zealand at 60V)

Only above 1000V RMS AC or 1500 V DC is considered 'high voltage'.

That's why a correct sticker on domestic equipment will usually use the wording 'Dangerous voltage' or 'Hazardous voltage' or the like, not 'high voltage'. An actual correctly placed 'Danger - High Voltage' sign tends to mean something like 11kV AC