RGB Led strip bluetooth controller

Hi. I bought a 5V RGB LED strip bluetooth controller. It states that it operates at 5 to 24 volts. but it has a USB input. It works well with 5 volts. I want to know if it can be used to control a 12 volt LED strip with 12V power supply.

This does not sound like an Arduino question. What does the documentation exactly states?

the output seems to be listed on the picture

but it's unclear what the 3x means. I'd be tempted to say it's better to measure...