Works perfectly, is not a noise source in my use, is a very good value at the advertised price. Note: for voltage up conversion, you need 3X the wattage draw of the 220 device, so this 300 watt voltage converter works very well for my 220 device, which draws 42 watts (3x42 = 126, so lots of wattage "headroom"). It does not get warm, let alone hot. If a voltage up converter gets hot, you are pushing it too hard.