This tool allows you to change the settings of our PTZ-LX550L3X Pan/Tilt/Zoom Camera and our PT-LX540 Pan/Tilt Camera. You will only need this tool if you need to install multiple PT or PTZ units in the same surveillance system. You will also need this tool if you need to set the camera to another setting besides the default address of 1. You can also use this unit to control a standalone PTZ. This is great when you need easy live surveillance but don't need a DVR. This tool required a 5VDC power supply (sold separately).