they came with just a USB connector as shown in photos, but no power supply. I took a picture of the power it uses 4.3v 2.5A, and overall power is 10watts. you need a power supply or power-bank that can supply that power or it won't work.. you can power it from AA batteries its just an element so no curcuitrie.. they get warm but not impressed. suggest buying a pair with a power supply you would be better off.

they came with just a USB connector as shown in photos, but no power supply. I took a picture of the power it uses 4.3v 2.5A, and overall power is 10watts. you need a power supply or power-bank that can supply that power or it won't work.. you can power it from AA batteries its just an element so no curcuitrie.. they get warm but not impressed. suggest buying a pair with a power supply you would be better off.

they came with just a USB connector as shown in photos, but no power supply. I took a picture of the power it uses 4.3v 2.5A, and overall power is 10watts. you need a power supply or power-bank that can supply that power or it won't work.. you can power it from AA batteries its just an element so no curcuitrie.. they get warm but not impressed. suggest buying a pair with a power supply you would be better off.