This is a 7.5V wall adapter. ط¢آ It is not commonly available in the market. ط¢آ The best part of this adapter is that it allows Arduino project to runط¢آ independently. ط¢آ For some projects need motor or servo, 5V ط¢آ do not have the sufficient power, 12V is kind of over-supply that may cause potential overheated problem. 7.5V is just the right voltage for those projects, provides safe and enough power. ط¢آ ط¢آ It comes with a ط¢آ DC2.1 connector which isط¢آ Arduino power jack compatible. ط¢آ Plug&Play!