I was looking on ebay for a power supply to power both the Arduino and a 5V relay board. I came across this (http://www.ebay.com/itm/290768591438?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649) and ordered a few but now I am wondering if there was anything that I should be considering regarding the specifications that they have listed. Can anyone suggest anything about this that would make it unacceptable for use in this regards?