Hardware keyloggers are usually used on desktop comps. Follow the mouse cord to the back of the comp. The mouse cord will plug into the keylogger, with the keylogger pl***ed into the comp. Some are disguised as usb thumb drives too. Pics here. http://www.google.com/search?q=hardware+keylogger&hl=en&safe=off&prmd=imvns&source=lnms&tbm=isch&sa=X&ei=VqBZUI6CBobs2AWi-4DQDA&sqi=2&ved=0CAcQ_AUoAQ&biw=*600&bih=775