Extremely useful & highly covert the Spy Cobra is perfect for parents that want to keep an eye on their kids internet activities or employers who suspect their staff are up to something or private investigators gathering information What makes this device different is that it doesnt have to be left plugged into a PC You plug it into a USB (Universal Serial Bus) port & within 15 seconds you can install a small piece of software that will log keys remember websites visited & take screen shots at regular intervals Theres no hardware to detect & when you want to retrieve the information gathered you just plug the Spy Cobra unit into the PC again & everything will be uploaded onto it so you can take it away & examine it laternbspnbspnbsp