[LAU] Delta 1010 Power On and Off (Breakout Box)

Perhaps I'm missing something but, is there a power on/off button or switch on the M-Audio Delta 1010 breakout box? Is it okay to simply plug it (the power cord into the back of the box) in to turn it on and unplug it (the same power cord) to turn it off? I'm hoping that kind of a "cold" power on/off doesn't damage anything. I know that it would be bad to unplug the cable (parallel?) that leads to the PCI card, at least while the computer is on. There was a pretty big sticker on the breakout box, at purchase, that gave that clear warning. So, definitely not doing that. Does anybody ever just leave their Delta 1010 breakout box power supply plugged in all the time? When I plug mine in, turning it on, the device tends to get warm pretty fast, which leads me to believe that perhaps after prolonged periods of time it might get very hot. If it's safe to just plug it in when using it and unplug it when not using it, then I'll keep doing that. It's kind of silly that the device doesn't actually come with a simple Power On/Off button or switch. ;-) Oh well. (Or maybe I'm not seeing it?)