I bought this keyboard from a friend a few months ago and as I installed it to my CPU I faced some connectivity issues with it. first of all the lights of the keyboard didn't work properly so I didn't know whether the keyboard was getting the power supply or not. At the windows login page I was not able to type the password with it. I plugged out the keyboard wire and then plugged in again but still faced the same issue. I contacted the customer service centre and they replace the keyboard with the new one. so now this keyboard at least when I connected it to my CPU it showed the power supply indicator. Now coming to the review of the keyboard , the keys of the keyboard are really very hard to press you have to use literally two finger force to press single key. also that the statement typing response of this keyboard is very low so I have to type the same alphabet over and over again to get the proper output. I also faced the issue that the keyboard stops responding for a few seconds. The shortcut keys on the keyboard were also non-functional.